20121322121312 has 48 divisors (see below), whose sum is σ = 39722136199200. Its totient is φ = 10033168957440.

The previous prime is 20121322121239. The next prime is 20121322121323. The reversal of 20121322121312 is 21312122312102.

It is a congruent 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, 78431264 + ... + 78687392.

It is an arithmetic number, because the mean of its divisors is an integer number (827544504150).

Almost surely, 2^{20121322121312} is an apocalyptic number.

It is an amenable number.

20121322121312 is a deficient number, since it is larger than the sum of its proper divisors (19600814077888).

20121322121312 is a wasteful number, since it uses less digits than its factorization.

20121322121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262839 (or 262831 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20121322121312 its reverse (21312122312102), we get a palindrome (41433444433414).

The spelling of 20121322121312 in words is "twenty trillion, one hundred twenty-one billion, three hundred twenty-two million, one hundred twenty-one thousand, three hundred twelve".