123121301122231 has 4 divisors (see below), whose sum is σ = 123270901731952. Its totient is φ = 122971700512512.

The previous prime is 123121301122229. The next prime is 123121301122249. The reversal of 123121301122231 is 132221103121321.

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 123121301122231 - 2¹ = 123121301122229 is a prime.

It is a super-2 number, since 2×123121301122231² (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 = 123121301122196 and 123121301122205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123121301122931) 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 3 ways as a sum of consecutive naturals, for example, 74800303626 + ... + 74800305271.

It is an arithmetic number, because the mean of its divisors is an integer number (30817725432988).

Almost surely, 2^{123121301122231} is an apocalyptic number.

123121301122231 is a deficient number, since it is larger than the sum of its proper divisors (149600609721).

123121301122231 is an equidigital number, since it uses as much as digits as its factorization.

123121301122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149600609720.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 123121301122231 its reverse (132221103121321), we get a palindrome (255342404243552).

The spelling of 123121301122231 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, three hundred one million, one hundred twenty-two thousand, two hundred thirty-one".