20211212133312 has 56 divisors (see below), whose sum is σ = 54920782539216. Its totient is φ = 6554987716608.

The previous prime is 20211212133311. The next prime is 20211212133367. The reversal of 20211212133312 is 21333121211202.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211212133311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1422516273 + ... + 1422530480.

Almost surely, 2^{20211212133312} is an apocalyptic number.

It is an amenable number.

20211212133312 is an abundant number, since it is smaller than the sum of its proper divisors (34709570405904).

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

20211212133312 is a wasteful number, since it uses less digits than its factorization.

20211212133312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845046805 (or 2845046795 counting only the distinct ones).

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

Adding to 20211212133312 its reverse (21333121211202), we get a palindrome (41544333344514).

The spelling of 20211212133312 in words is "twenty trillion, two hundred eleven billion, two hundred twelve million, one hundred thirty-three thousand, three hundred twelve".