123150215055 has 48 divisors (see below), whose sum is σ = 229368029184. Its totient is φ = 56258475840.

The previous prime is 123150215029. The next prime is 123150215059. The reversal of 123150215055 is 550512051321.

It is not a de Polignac number, because 123150215055 - 2¹¹ = 123150213007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123150215059) 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, 1024234 + ... + 1138136.

It is an arithmetic number, because the mean of its divisors is an integer number (4778500608).

Almost surely, 2^123150215055 is an apocalyptic number.

123150215055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123150215055 is a deficient number, since it is larger than the sum of its proper divisors (106217814129).

123150215055 is a wasteful number, since it uses less digits than its factorization.

123150215055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115396 (or 115389 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

Adding to 123150215055 its reverse (550512051321), we get a palindrome (673662266376).

The spelling of 123150215055 in words is "one hundred twenty-three billion, one hundred fifty million, two hundred fifteen thousand, fifty-five".