22131002312 has 8 divisors (see below), whose sum is σ = 41495629350. Its totient is φ = 11065501152.

The previous prime is 22131002287. The next prime is 22131002317. The reversal of 22131002312 is 21320013122.

It can be written as a sum of positive squares in only one way, i.e., 16865177956 + 5265824356 = 129866^2 + 72566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (22131002317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1383187637 + ... + 1383187652.

Almost surely, 2^22131002312 is an apocalyptic number.

It is an amenable number.

22131002312 is a deficient number, since it is larger than the sum of its proper divisors (19364627038).

22131002312 is a wasteful number, since it uses less digits than its factorization.

22131002312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766375295 (or 2766375291 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22131002312 its reverse (21320013122), we get a palindrome (43451015434).

The spelling of 22131002312 in words is "twenty-two billion, one hundred thirty-one million, two thousand, three hundred twelve".