2021111585898 has 64 divisors (see below), whose sum is σ = 4330354089600. Its totient is φ = 627737160960.

The previous prime is 2021111585897. The next prime is 2021111585929. The reversal of 2021111585898 is 8985851111202.

It is a super-2 number, since 2×2021111585898² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021111585898.

It is not an unprimeable number, because it can be changed into a prime (2021111585897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1233868 + ... + 2358951.

It is an arithmetic number, because the mean of its divisors is an integer number (67661782650).

Almost surely, 2^{2021111585898} is an apocalyptic number.

2021111585898 is an abundant number, since it is smaller than the sum of its proper divisors (2309242503702).

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

2021111585898 is a wasteful number, since it uses less digits than its factorization.

2021111585898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3592967.

The product of its (nonzero) digits is 460800, while the sum is 51.

The spelling of 2021111585898 in words is "two trillion, twenty-one billion, one hundred eleven million, five hundred eighty-five thousand, eight hundred ninety-eight".