22021320231212 has 24 divisors (see below), whose sum is σ = 39171653270400. Its totient is φ = 10829443109760.

The previous prime is 22021320231193. The next prime is 22021320231217. The reversal of 22021320231212 is 21213202312022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22021320231217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739568 + ... + 6677544.

It is an arithmetic number, because the mean of its divisors is an integer number (1632152219600).

Almost surely, 2^{22021320231212} is an apocalyptic number.

It is an amenable number.

22021320231212 is a deficient number, since it is larger than the sum of its proper divisors (17150333039188).

22021320231212 is a wasteful number, since it uses less digits than its factorization.

22021320231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5953241 (or 5953239 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 22021320231212 its reverse (21213202312022), we get a palindrome (43234522543234).

The spelling of 22021320231212 in words is "twenty-two trillion, twenty-one billion, three hundred twenty million, two hundred thirty-one thousand, two hundred twelve".