2112122022021 has 18 divisors (see below), whose sum is σ = 3353405856710. Its totient is φ = 1280073952080.

The previous prime is 2112122021983. The next prime is 2112122022053. The reversal of 2112122022021 is 1202202212112.

It is a happy number.

2112122022021 is a `hidden beast` number, since 211 + 212 + 2 + 0 + 220 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2056682964996 + 55439057025 = 1434114^2 + 235455^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2112122022021 is a prime.

It is a super-2 number, since 2×2112122022021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112122021985 and 2112122022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112122021021) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 969751906 + ... + 969754083.

Almost surely, 2^{2112122022021} is an apocalyptic number.

It is an amenable number.

2112122022021 is a deficient number, since it is larger than the sum of its proper divisors (1241283834689).

2112122022021 is a wasteful number, since it uses less digits than its factorization.

2112122022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939506017 (or 1939506003 counting only the distinct ones).

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

Adding to 2112122022021 its reverse (1202202212112), we get a palindrome (3314324234133).

The spelling of 2112122022021 in words is "two trillion, one hundred twelve billion, one hundred twenty-two million, twenty-two thousand, twenty-one".