1012143220 has 108 divisors (see below), whose sum is σ = 2417207436. Its totient is φ = 355520000.

The previous prime is 1012143217. The next prime is 1012143227. The reversal of 1012143220 is 223412101.

It can be written as a sum of positive squares in 6 ways, for example, as 53993104 + 958150116 = 7348^2 + 30954^2 .

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1012143194 and 1012143203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012143227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10021170 + ... + 10021270.

Almost surely, 2^1012143220 is an apocalyptic number.

1012143220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012143220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208603718).

1012143220 is an abundant number, since it is smaller than the sum of its proper divisors (1405064216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1012143220 is a wasteful number, since it uses less digits than its factorization.

1012143220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1012143220 is about 31814.1984026001. The cubic root of 1012143220 is about 1004.0314654456.

Adding to 1012143220 its reverse (223412101), we get a palindrome (1235555321).

The spelling of 1012143220 in words is "one billion, twelve million, one hundred forty-three thousand, two hundred twenty".