123033313143551 has 4 divisors (see below), whose sum is σ = 124301697815232. Its totient is φ = 121764928471872.

The previous prime is 123033313143529. The next prime is 123033313143563. The reversal of 123033313143551 is 155341313330321.

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 123033313143551 - 2⁶ = 123033313143487 is a prime.

It is a super-2 number, since 2×123033313143551² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123033313143581) 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, 634192335695 + ... + 634192335888.

It is an arithmetic number, because the mean of its divisors is an integer number (31075424453808).

Almost surely, 2^{123033313143551} is an apocalyptic number.

123033313143551 is a deficient number, since it is larger than the sum of its proper divisors (1268384671681).

123033313143551 is an equidigital number, since it uses as much as digits as its factorization.

123033313143551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268384671680.

The product of its (nonzero) digits is 145800, while the sum is 38.

Adding to 123033313143551 its reverse (155341313330321), we get a palindrome (278374626473872).

The spelling of 123033313143551 in words is "one hundred twenty-three trillion, thirty-three billion, three hundred thirteen million, one hundred forty-three thousand, five hundred fifty-one".