20012122211231 has 2 divisors, whose sum is σ = 20012122211232. Its totient is φ = 20012122211230.

The previous prime is 20012122211201. The next prime is 20012122211233. The reversal of 20012122211231 is 13211222121002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20012122211231 - 2¹⁸ = 20012121949087 is a prime.

It is a super-2 number, since 2×20012122211231² (a number of 27 digits) contains 22 as substring.

Together with 20012122211233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012122211233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006061105615 + 10006061105616.

It is an arithmetic number, because the mean of its divisors is an integer number (10006061105616).

Almost surely, 2^{20012122211231} is an apocalyptic number.

20012122211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012122211231 is an equidigital number, since it uses as much as digits as its factorization.

20012122211231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20012122211231 its reverse (13211222121002), we get a palindrome (33223344332233).

The spelling of 20012122211231 in words is "twenty trillion, twelve billion, one hundred twenty-two million, two hundred eleven thousand, two hundred thirty-one".