1222321512 has 16 divisors (see below), whose sum is σ = 3055803840. Its totient is φ = 407440496.

The previous prime is 1222321511. The next prime is 1222321567. The reversal of 1222321512 is 2151232221.

It is a super-2 number, since 2×1222321512² = 2988139757395932288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1222321511) 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, 25465008 + ... + 25465055.

It is an arithmetic number, because the mean of its divisors is an integer number (190987740).

Almost surely, 2^1222321512 is an apocalyptic number.

1222321512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222321512 is an abundant number, since it is smaller than the sum of its proper divisors (1833482328).

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

1222321512 is a wasteful number, since it uses less digits than its factorization.

1222321512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50930072 (or 50930068 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 1222321512 is about 34961.7149464954. The cubic root of 1222321512 is about 1069.2070615211.

Adding to 1222321512 its reverse (2151232221), we get a palindrome (3373553733).

The spelling of 1222321512 in words is "one billion, two hundred twenty-two million, three hundred twenty-one thousand, five hundred twelve".