2120102122221 has 32 divisors (see below), whose sum is σ = 3181997548800. Its totient is φ = 1394992238400.

The previous prime is 2120102122213. The next prime is 2120102122249. The reversal of 2120102122221 is 1222212010212.

It is a happy number.

It is not a de Polignac number, because 2120102122221 - 2³ = 2120102122213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120102122194 and 2120102122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120102122211) 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, 361801 + ... + 2090718.

It is an arithmetic number, because the mean of its divisors is an integer number (99437423400).

Almost surely, 2^{2120102122221} is an apocalyptic number.

It is an amenable number.

2120102122221 is a deficient number, since it is larger than the sum of its proper divisors (1061895426579).

2120102122221 is a wasteful number, since it uses less digits than its factorization.

2120102122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452946 (or 2452940 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2120102122221 its reverse (1222212010212), we get a palindrome (3342314132433).

The spelling of 2120102122221 in words is "two trillion, one hundred twenty billion, one hundred two million, one hundred twenty-two thousand, two hundred twenty-one".