20123210011312 has 40 divisors (see below), whose sum is σ = 39852272005632. Its totient is φ = 9839118369600.

The previous prime is 20123210011279. The next prime is 20123210011321. The reversal of 20123210011312 is 21311001232102.

It is a super-2 number, since 2×20123210011312² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20123210011312.

It is an unprimeable number.

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, 10545364 + ... + 12306547.

Almost surely, 2^{20123210011312} is an apocalyptic number.

It is an amenable number.

20123210011312 is a deficient number, since it is larger than the sum of its proper divisors (19729061994320).

20123210011312 is a wasteful number, since it uses less digits than its factorization.

20123210011312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22853137 (or 22853131 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20123210011312 its reverse (21311001232102), we get a palindrome (41434211243414).

The spelling of 20123210011312 in words is "twenty trillion, one hundred twenty-three billion, two hundred ten million, eleven thousand, three hundred twelve".