123053215551 has 128 divisors (see below), whose sum is σ = 204731596800. Its totient is φ = 64194923520.

The previous prime is 123053215529. The next prime is 123053215553. The reversal of 123053215551 is 155512350321.

It is a happy number.

It is not a de Polignac number, because 123053215551 - 2¹⁴ = 123053199167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123053215553) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 324678480 + ... + 324678858.

It is an arithmetic number, because the mean of its divisors is an integer number (1599465600).

Almost surely, 2^123053215551 is an apocalyptic number.

123053215551 is a deficient number, since it is larger than the sum of its proper divisors (81678381249).

123053215551 is a wasteful number, since it uses less digits than its factorization.

123053215551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its (nonzero) digits is 22500, while the sum is 33.

Adding to 123053215551 its reverse (155512350321), we get a palindrome (278565565872).

The spelling of 123053215551 in words is "one hundred twenty-three billion, fifty-three million, two hundred fifteen thousand, five hundred fifty-one".