1012012220 has 24 divisors (see below), whose sum is σ = 2156948304. Its totient is φ = 398762496.

The previous prime is 1012012201. The next prime is 1012012229. The reversal of 1012012220 is 222102101.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012012229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376277 + ... + 378956.

It is an arithmetic number, because the mean of its divisors is an integer number (89872846).

Almost surely, 2^1012012220 is an apocalyptic number.

1012012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012012220 is an abundant number, since it is smaller than the sum of its proper divisors (1144936084).

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

1012012220 is a wasteful number, since it uses less digits than its factorization.

1012012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755309 (or 755307 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1012012220 is about 31812.1395067983. The cubic root of 1012012220 is about 1003.9881468736.

Adding to 1012012220 its reverse (222102101), we get a palindrome (1234114321).

The spelling of 1012012220 in words is "one billion, twelve million, twelve thousand, two hundred twenty".