20211312123312 has 120 divisors (see below), whose sum is σ = 58346703022896. Its totient is φ = 6007077199872.

The previous prime is 20211312123257. The next prime is 20211312123347. The reversal of 20211312123312 is 21332121311202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34011193 + ... + 34600344.

Almost surely, 2^{20211312123312} is an apocalyptic number.

It is an amenable number.

20211312123312 is an abundant number, since it is smaller than the sum of its proper divisors (38135390899584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20211312123312 is a wasteful number, since it uses less digits than its factorization.

20211312123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68611603 (or 68611578 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20211312123312 its reverse (21332121311202), we get a palindrome (41543433434514).

The spelling of 20211312123312 in words is "twenty trillion, two hundred eleven billion, three hundred twelve million, one hundred twenty-three thousand, three hundred twelve".