20112121133312 has 72 divisors (see below), whose sum is σ = 43234928407104. Its totient is φ = 9282276993024.

The previous prime is 20112121133239. The next prime is 20112121133329. The reversal of 20112121133312 is 21333112121102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230064203 + ... + 230151605.

Almost surely, 2^{20112121133312} is an apocalyptic number.

It is an amenable number.

20112121133312 is an abundant number, since it is smaller than the sum of its proper divisors (23122807273792).

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

20112121133312 is an equidigital number, since it uses as much as digits as its factorization.

20112121133312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156575 (or 156561 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 20112121133312 its reverse (21333112121102), we get a palindrome (41445233254414).

The spelling of 20112121133312 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one million, one hundred thirty-three thousand, three hundred twelve".