1011012220 has 12 divisors (see below), whose sum is σ = 2123125704. Its totient is φ = 404404880.

The previous prime is 1011012157. The next prime is 1011012229. The reversal of 1011012220 is 222101101.

1011012220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1011012197 and 1011012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011012229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25275286 + ... + 25275325.

It is an arithmetic number, because the mean of its divisors is an integer number (176927142).

Almost surely, 2^1011012220 is an apocalyptic number.

1011012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011012220 is an abundant number, since it is smaller than the sum of its proper divisors (1112113484).

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

1011012220 is a wasteful number, since it uses less digits than its factorization.

1011012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50550620 (or 50550618 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1011012220 is about 31796.4183517578. The cubic root of 1011012220 is about 1003.6573475021.

Adding to 1011012220 its reverse (222101101), we get a palindrome (1233113321).

The spelling of 1011012220 in words is "one billion, eleven million, twelve thousand, two hundred twenty".