220311312133231 has 8 divisors (see below), whose sum is σ = 242719213368528. Its totient is φ = 198300010920000.

The previous prime is 220311312133229. The next prime is 220311312133249. The reversal of 220311312133231 is 132331213113022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220311312133231 - 2¹ = 220311312133229 is a prime.

It is a super-2 number, since 2×220311312133231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220311312133231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220311312133201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99150004350 + ... + 99150006571.

It is an arithmetic number, because the mean of its divisors is an integer number (30339901671066).

Almost surely, 2^{220311312133231} is an apocalyptic number.

220311312133231 is a deficient number, since it is larger than the sum of its proper divisors (22407901235297).

220311312133231 is a wasteful number, since it uses less digits than its factorization.

220311312133231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198300011033.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 220311312133231 its reverse (132331213113022), we get a palindrome (352642525246253).

The spelling of 220311312133231 in words is "two hundred twenty trillion, three hundred eleven billion, three hundred twelve million, one hundred thirty-three thousand, two hundred thirty-one".