2122111122021 has 80 divisors (see below), whose sum is σ = 3519003660480. Its totient is φ = 1263562053120.

The previous prime is 2122111121989. The next prime is 2122111122029. The reversal of 2122111122021 is 1202211112212.

2122111122021 is a `hidden beast` number, since 212 + 211 + 1 + 1 + 220 + 21 = 666.

It is not a de Polignac number, because 2122111122021 - 2⁵ = 2122111121989 is a prime.

It is a super-2 number, since 2×2122111122021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2122111121985 and 2122111122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122111122029) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 93403755 + ... + 93426471.

It is an arithmetic number, because the mean of its divisors is an integer number (43987545756).

Almost surely, 2^{2122111122021} is an apocalyptic number.

It is an amenable number.

2122111122021 is a deficient number, since it is larger than the sum of its proper divisors (1396892538459).

2122111122021 is a wasteful number, since it uses less digits than its factorization.

2122111122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24576 (or 24567 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2122111122021 its reverse (1202211112212), we get a palindrome (3324322234233).

The spelling of 2122111122021 in words is "two trillion, one hundred twenty-two billion, one hundred eleven million, one hundred twenty-two thousand, twenty-one".