2120100022021 has 12 divisors (see below), whose sum is σ = 2285944181856. Its totient is φ = 1962504908760.

The previous prime is 2120100021973. The next prime is 2120100022057. The reversal of 2120100022021 is 1202200010212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2120100022021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120100021992 and 2120100022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120100022081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47937451 + ... + 47981656.

It is an arithmetic number, because the mean of its divisors is an integer number (190495348488).

Almost surely, 2^{2120100022021} is an apocalyptic number.

It is an amenable number.

2120100022021 is a deficient number, since it is larger than the sum of its proper divisors (165844159835).

2120100022021 is an equidigital number, since it uses as much as digits as its factorization.

2120100022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95919192 (or 95919161 counting only the distinct ones).

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

Adding to 2120100022021 its reverse (1202200010212), we get a palindrome (3322300032233).

The spelling of 2120100022021 in words is "two trillion, one hundred twenty billion, one hundred million, twenty-two thousand, twenty-one".