20123210021331 has 32 divisors (see below), whose sum is σ = 27857278451520. Its totient is φ = 12905686169600.

The previous prime is 20123210021293. The next prime is 20123210021351. The reversal of 20123210021331 is 13312001232102.

It is a cyclic number.

It is not a de Polignac number, because 20123210021331 - 2⁶ = 20123210021267 is a prime.

It is a super-2 number, since 2×20123210021331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20123210021298 and 20123210021307.

It is not an unprimeable number, because it can be changed into a prime (20123210021351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370613821 + ... + 370668113.

It is an arithmetic number, because the mean of its divisors is an integer number (870539951610).

Almost surely, 2^{20123210021331} is an apocalyptic number.

20123210021331 is a deficient number, since it is larger than the sum of its proper divisors (7734068430189).

20123210021331 is a wasteful number, since it uses less digits than its factorization.

20123210021331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69767.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20123210021331 its reverse (13312001232102), we get a palindrome (33435211253433).

The spelling of 20123210021331 in words is "twenty trillion, one hundred twenty-three billion, two hundred ten million, twenty-one thousand, three hundred thirty-one".