1031221772 has 12 divisors (see below), whose sum is σ = 2062443600. Its totient is φ = 441952176.

The previous prime is 1031221753. The next prime is 1031221801. The reversal of 1031221772 is 2771221301.

1031221772 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18414647 + ... + 18414702.

It is an arithmetic number, because the mean of its divisors is an integer number (171870300).

Almost surely, 2^1031221772 is an apocalyptic number.

It is an amenable number.

1031221772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1031221772 is a wasteful number, since it uses less digits than its factorization.

1031221772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36829360 (or 36829358 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 1031221772 is about 32112.6419342912. The cubic root of 1031221772 is about 1010.3007867988.

The spelling of 1031221772 in words is "one billion, thirty-one million, two hundred twenty-one thousand, seven hundred seventy-two".