901021012 has 24 divisors (see below), whose sum is σ = 1670785704. Its totient is φ = 423693312.

The previous prime is 901021007. The next prime is 901021049. The reversal of 901021012 is 210120109.

It can be written as a sum of positive squares in 4 ways, for example, as 399440196 + 501580816 = 19986^2 + 22396^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104448 + ... + 112744.

It is an arithmetic number, because the mean of its divisors is an integer number (69616071).

Almost surely, 2^901021012 is an apocalyptic number.

It is an amenable number.

901021012 is a deficient number, since it is larger than the sum of its proper divisors (769764692).

901021012 is a wasteful number, since it uses less digits than its factorization.

901021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9915 (or 9913 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 901021012 is about 30017.0120431731. The cubic root of 901021012 is about 965.8543489421.

The spelling of 901021012 in words is "nine hundred one million, twenty-one thousand, twelve".