2101022002120 has 16 divisors (see below), whose sum is σ = 4727299504860. Its totient is φ = 840408800832.

The previous prime is 2101022002109. The next prime is 2101022002133. The reversal of 2101022002120 is 212002201012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2056419096484 + 44602905636 = 1434022^2 + 211194^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2101022002120.

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, 26262774987 + ... + 26262775066.

Almost surely, 2^{2101022002120} is an apocalyptic number.

2101022002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101022002120 is an abundant number, since it is smaller than the sum of its proper divisors (2626277502740).

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

2101022002120 is a wasteful number, since it uses less digits than its factorization.

2101022002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52525550064 (or 52525550060 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2101022002120 its reverse (212002201012), we get a palindrome (2313024203132).

The spelling of 2101022002120 in words is "two trillion, one hundred one billion, twenty-two million, two thousand, one hundred twenty".