2122012212021 has 12 divisors (see below), whose sum is σ = 3300907885548. Its totient is φ = 1305853668864.

The previous prime is 2122012212011. The next prime is 2122012212031. The reversal of 2122012212021 is 1202122102212.

It is a happy number.

2122012212021 is a `hidden beast` number, since 21 + 220 + 1 + 221 + 202 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2122012212011) and next prime (2122012212031).

It can be written as a sum of positive squares in 2 ways, for example, as 346485276900 + 1775526935121 = 588630^2 + 1332489^2 .

It is not a de Polignac number, because 2122012212021 - 2³⁵ = 2087652473653 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2122012211985 and 2122012212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122012212011) 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, 9068428140 + ... + 9068428373.

It is an arithmetic number, because the mean of its divisors is an integer number (275075657129).

Almost surely, 2^{2122012212021} is an apocalyptic number.

It is an amenable number.

2122012212021 is a deficient number, since it is larger than the sum of its proper divisors (1178895673527).

2122012212021 is a wasteful number, since it uses less digits than its factorization.

2122012212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18136856532 (or 18136856529 counting only the distinct ones).

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

Adding to 2122012212021 its reverse (1202122102212), we get a palindrome (3324134314233).

The spelling of 2122012212021 in words is "two trillion, one hundred twenty-two billion, twelve million, two hundred twelve thousand, twenty-one".