123051213313551 has 48 divisors (see below), whose sum is σ = 188355763211616. Its totient is φ = 77143073476608.

The previous prime is 123051213313531. The next prime is 123051213313571. The reversal of 123051213313551 is 155313312150321.

123051213313551 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 51 + 21 + 3 + 31 + 3 + 551 = 666.

It is an interprime number because it is at equal distance from previous prime (123051213313531) and next prime (123051213313571).

It is not a de Polignac number, because 123051213313551 - 2⁷ = 123051213313423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123051213313531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1036833751 + ... + 1036952423.

It is an arithmetic number, because the mean of its divisors is an integer number (3924078400242).

Almost surely, 2^{123051213313551} is an apocalyptic number.

123051213313551 is a deficient number, since it is larger than the sum of its proper divisors (65304549898065).

123051213313551 is a wasteful number, since it uses less digits than its factorization.

123051213313551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124392 (or 124389 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

Adding to 123051213313551 its reverse (155313312150321), we get a palindrome (278364525463872).

The spelling of 123051213313551 in words is "one hundred twenty-three trillion, fifty-one billion, two hundred thirteen million, three hundred thirteen thousand, five hundred fifty-one".