123405341322251 has 32 divisors (see below), whose sum is σ = 137510537894400. Its totient is φ = 110249233436160.

The previous prime is 123405341322247. The next prime is 123405341322253. The reversal of 123405341322251 is 152223143504321.

It is a cyclic number.

It is not a de Polignac number, because 123405341322251 - 2² = 123405341322247 is a prime.

It is a super-2 number, since 2×123405341322251² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123405341322253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 648311171 + ... + 648501491.

It is an arithmetic number, because the mean of its divisors is an integer number (4297204309200).

Almost surely, 2^{123405341322251} is an apocalyptic number.

123405341322251 is a deficient number, since it is larger than the sum of its proper divisors (14105196572149).

123405341322251 is a wasteful number, since it uses less digits than its factorization.

123405341322251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217779.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 123405341322251 its reverse (152223143504321), we get a palindrome (275628484826572).

The spelling of 123405341322251 in words is "one hundred twenty-three trillion, four hundred five billion, three hundred forty-one million, three hundred twenty-two thousand, two hundred fifty-one".