123013312011554 has 16 divisors (see below), whose sum is σ = 193731721444800. Its totient is φ = 58499382550224.

The previous prime is 123013312011523. The next prime is 123013312011607. The reversal of 123013312011554 is 455110213310321.

It is a super-2 number, since 2×123013312011554² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123013312011554.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15827751134 + ... + 15827758905.

It is an arithmetic number, because the mean of its divisors is an integer number (12108232590300).

Almost surely, 2^{123013312011554} is an apocalyptic number.

123013312011554 is a deficient number, since it is larger than the sum of its proper divisors (70718409433246).

123013312011554 is a wasteful number, since it uses less digits than its factorization.

123013312011554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31655510137.

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 123013312011554 its reverse (455110213310321), we get a palindrome (578123525321875).

The spelling of 123013312011554 in words is "one hundred twenty-three trillion, thirteen billion, three hundred twelve million, eleven thousand, five hundred fifty-four".