22021232312 has 16 divisors (see below), whose sum is σ = 41291661600. Its totient is φ = 11010122560.

The previous prime is 22021232293. The next prime is 22021232339. The reversal of 22021232312 is 21323212022.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186764 + ... + 280932.

It is an arithmetic number, because the mean of its divisors is an integer number (2580728850).

Almost surely, 2^22021232312 is an apocalyptic number.

It is an amenable number.

22021232312 is a deficient number, since it is larger than the sum of its proper divisors (19270429288).

22021232312 is a wasteful number, since it uses less digits than its factorization.

22021232312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123406 (or 123402 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22021232312 its reverse (21323212022), we get a palindrome (43344444334).

The spelling of 22021232312 in words is "twenty-two billion, twenty-one million, two hundred thirty-two thousand, three hundred twelve".