22021131212 has 12 divisors (see below), whose sum is σ = 38538281376. Its totient is φ = 11010193680.

The previous prime is 22021131193. The next prime is 22021131217. The reversal of 22021131212 is 21213112022.

It is a super-2 number, since 2×22021131212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22021131217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73262 + ... + 222282.

It is an arithmetic number, because the mean of its divisors is an integer number (3211523448).

Almost surely, 2^22021131212 is an apocalyptic number.

It is an amenable number.

22021131212 is a deficient number, since it is larger than the sum of its proper divisors (16517150164).

22021131212 is a wasteful number, since it uses less digits than its factorization.

22021131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185968 (or 185966 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 22021131212 its reverse (21213112022), we get a palindrome (43234243234).

The spelling of 22021131212 in words is "twenty-two billion, twenty-one million, one hundred thirty-one thousand, two hundred twelve".