220100131312123 has 4 divisors (see below), whose sum is σ = 220100174668360. Its totient is φ = 220100087955888.

The previous prime is 220100131312097. The next prime is 220100131312129. The reversal of 220100131312123 is 321213131001022.

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 220100131312123 - 2²¹ = 220100129214971 is a prime.

It is a super-2 number, since 2×220100131312123² (a number of 29 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 = 220100131312094 and 220100131312103.

It is not an unprimeable number, because it can be changed into a prime (220100131312129) 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, 12870465 + ... + 24614002.

It is an arithmetic number, because the mean of its divisors is an integer number (55025043667090).

Almost surely, 2^{220100131312123} is an apocalyptic number.

220100131312123 is a deficient number, since it is larger than the sum of its proper divisors (43356237).

220100131312123 is an equidigital number, since it uses as much as digits as its factorization.

220100131312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43356236.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 220100131312123 its reverse (321213131001022), we get a palindrome (541313262313145).

The spelling of 220100131312123 in words is "two hundred twenty trillion, one hundred billion, one hundred thirty-one million, three hundred twelve thousand, one hundred twenty-three".