22131211012 has 12 divisors (see below), whose sum is σ = 38730854736. Its totient is φ = 11065252520.

The previous prime is 22131210979. The next prime is 22131211013. The reversal of 22131211012 is 21011213122.

It is not an unprimeable number, because it can be changed into a prime (22131211013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95187 + ... + 230917.

It is an arithmetic number, because the mean of its divisors is an integer number (3227571228).

Almost surely, 2^22131211012 is an apocalyptic number.

It is an amenable number.

22131211012 is a deficient number, since it is larger than the sum of its proper divisors (16599643724).

22131211012 is a wasteful number, since it uses less digits than its factorization.

22131211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176498 (or 176496 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 22131211012 its reverse (21011213122), we get a palindrome (43142424134).

It can be divided in two parts, 221312 and 11012, that added together give a square (232324 = 482²).

The spelling of 22131211012 in words is "twenty-two billion, one hundred thirty-one million, two hundred eleven thousand, twelve".