20213132111231 has 4 divisors (see below), whose sum is σ = 20265907913472. Its totient is φ = 20160356308992.

The previous prime is 20213132111201. The next prime is 20213132111303. The reversal of 20213132111231 is 13211123131202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20213132111231 - 2⁶ = 20213132111167 is a prime.

It is a super-2 number, since 2×20213132111231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213132111197 and 20213132111206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213132111201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26387900546 + ... + 26387901311.

It is an arithmetic number, because the mean of its divisors is an integer number (5066476978368).

Almost surely, 2^{20213132111231} is an apocalyptic number.

20213132111231 is a deficient number, since it is larger than the sum of its proper divisors (52775802241).

20213132111231 is an equidigital number, since it uses as much as digits as its factorization.

20213132111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52775802240.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 20213132111231 its reverse (13211123131202), we get a palindrome (33424255242433).

The spelling of 20213132111231 in words is "twenty trillion, two hundred thirteen billion, one hundred thirty-two million, one hundred eleven thousand, two hundred thirty-one".