2122202121021 has 12 divisors (see below), whose sum is σ = 3088803088800. Its totient is φ = 1404001402440.

The previous prime is 2122202121001. The next prime is 2122202121029. The reversal of 2122202121021 is 1201212022212.

It is a happy number.

2122202121021 is a `hidden beast` number, since 212 + 220 + 2 + 1 + 210 + 21 = 666.

It is not a de Polignac number, because 2122202121021 - 2⁵ = 2122202120989 is a prime.

It is a super-2 number, since 2×2122202121021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2122202120985 and 2122202121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122202121029) 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, 899999721 + ... + 900002078.

It is an arithmetic number, because the mean of its divisors is an integer number (257400257400).

Almost surely, 2^{2122202121021} is an apocalyptic number.

It is an amenable number.

2122202121021 is a deficient number, since it is larger than the sum of its proper divisors (966600967779).

2122202121021 is a wasteful number, since it uses less digits than its factorization.

2122202121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800001936 (or 1800001933 counting only the distinct ones).

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

Adding to 2122202121021 its reverse (1201212022212), we get a palindrome (3323414143233).

The spelling of 2122202121021 in words is "two trillion, one hundred twenty-two billion, two hundred two million, one hundred twenty-one thousand, twenty-one".