912011001021 has 8 divisors (see below), whose sum is σ = 1351127408960. Its totient is φ = 608007333996.

The previous prime is 912011001007. The next prime is 912011001071. The reversal of 912011001021 is 120100110219.

It is a happy number.

It is not a de Polignac number, because 912011001021 - 2³¹ = 909863517373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 912011000985 and 912011001003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (912011001071) 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, 16889092585 + ... + 16889092638.

It is an arithmetic number, because the mean of its divisors is an integer number (168890926120).

Almost surely, 2^912011001021 is an apocalyptic number.

It is an amenable number.

912011001021 is a deficient number, since it is larger than the sum of its proper divisors (439116407939).

912011001021 is a wasteful number, since it uses less digits than its factorization.

912011001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33778185232 (or 33778185226 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 912011001021 in words is "nine hundred twelve billion, eleven million, one thousand, twenty-one".