20122121312 has 12 divisors (see below), whose sum is σ = 39615426396. Its totient is φ = 10061060640.

The previous prime is 20122121309. The next prime is 20122121333. The reversal of 20122121312 is 21312122102.

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, 314408114 + ... + 314408177.

It is an arithmetic number, because the mean of its divisors is an integer number (3301285533).

Almost surely, 2^20122121312 is an apocalyptic number.

It is an amenable number.

20122121312 is a deficient number, since it is larger than the sum of its proper divisors (19493305084).

20122121312 is an equidigital number, since it uses as much as digits as its factorization.

20122121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628816301 (or 628816293 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20122121312 its reverse (21312122102), we get a palindrome (41434243414).

The spelling of 20122121312 in words is "twenty billion, one hundred twenty-two million, one hundred twenty-one thousand, three hundred twelve".