22000021312 has 14 divisors (see below), whose sum is σ = 43656292418. Its totient is φ = 11000010624.

The previous prime is 22000021297. The next prime is 22000021331. The reversal of 22000021312 is 21312000022.

It can be written as a sum of positive squares in only one way, i.e., 15134904576 + 6865116736 = 123024^2 + 82856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22000021292 and 22000021301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171875103 + ... + 171875230.

Almost surely, 2^22000021312 is an apocalyptic number.

It is an amenable number.

22000021312 is a deficient number, since it is larger than the sum of its proper divisors (21656271106).

22000021312 is an equidigital number, since it uses as much as digits as its factorization.

22000021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343750345 (or 343750335 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 22000021312 its reverse (21312000022), we get a palindrome (43312021334).

The spelling of 22000021312 in words is "twenty-two billion, twenty-one thousand, three hundred twelve".