1221250631052 has 48 divisors (see below), whose sum is σ = 2986464579840. Its totient is φ = 387683871168.

The previous prime is 1221250631033. The next prime is 1221250631077. The reversal of 1221250631052 is 2501360521221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9597978 + ... + 9724385.

It is an arithmetic number, because the mean of its divisors is an integer number (62218012080).

Almost surely, 2^{1221250631052} is an apocalyptic number.

1221250631052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221250631052 is an abundant number, since it is smaller than the sum of its proper divisors (1765213948788).

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

1221250631052 is a wasteful number, since it uses less digits than its factorization.

1221250631052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19322622 (or 19322620 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 1221250631052 in words is "one trillion, two hundred twenty-one billion, two hundred fifty million, six hundred thirty-one thousand, fifty-two".