2100021201892 has 6 divisors (see below), whose sum is σ = 3675037103318. Its totient is φ = 1050010600944.

The previous prime is 2100021201857. The next prime is 2100021201893. The reversal of 2100021201892 is 2981021200012.

It can be written as a sum of positive squares in only one way, i.e., 1116306354916 + 983714846976 = 1056554^2 + 991824^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2100021201892.

It is not an unprimeable number, because it can be changed into a prime (2100021201893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262502650233 + ... + 262502650240.

Almost surely, 2^{2100021201892} is an apocalyptic number.

It is an amenable number.

2100021201892 is a deficient number, since it is larger than the sum of its proper divisors (1575015901426).

2100021201892 is a wasteful number, since it uses less digits than its factorization.

2100021201892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525005300477 (or 525005300475 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 2100021201892 in words is "two trillion, one hundred billion, twenty-one million, two hundred one thousand, eight hundred ninety-two".