1221012530952 has 32 divisors (see below), whose sum is σ = 3052787849280. Its totient is φ = 406969974080.

The previous prime is 1221012530929. The next prime is 1221012530953. The reversal of 1221012530952 is 2590352101221.

It is not an unprimeable number, because it can be changed into a prime (1221012530953) 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, 1845324 + ... + 2418107.

It is an arithmetic number, because the mean of its divisors is an integer number (95399620290).

Almost surely, 2^{1221012530952} is an apocalyptic number.

1221012530952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221012530952 is an abundant number, since it is smaller than the sum of its proper divisors (1831775318328).

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

1221012530952 is a wasteful number, since it uses less digits than its factorization.

1221012530952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275373 (or 4275369 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 1221012530952 in words is "one trillion, two hundred twenty-one billion, twelve million, five hundred thirty thousand, nine hundred fifty-two".