22012130021 has 16 divisors (see below), whose sum is σ = 27196460160. Its totient is φ = 17391412800.

The previous prime is 22012130017. The next prime is 22012130039. The reversal of 22012130021 is 12003121022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22012130021 - 2² = 22012130017 is a prime.

It is a super-2 number, since 2×22012130021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22012129978 and 22012130005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012130321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2231630 + ... + 2241471.

It is an arithmetic number, because the mean of its divisors is an integer number (1699778760).

Almost surely, 2^22012130021 is an apocalyptic number.

It is an amenable number.

22012130021 is a deficient number, since it is larger than the sum of its proper divisors (5184330139).

22012130021 is a wasteful number, since it uses less digits than its factorization.

22012130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473164.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 22012130021 its reverse (12003121022), we get a palindrome (34015251043).

The spelling of 22012130021 in words is "twenty-two billion, twelve million, one hundred thirty thousand, twenty-one".