123011155015 has 48 divisors (see below), whose sum is σ = 182866392000. Its totient is φ = 79388391936.

The previous prime is 123011154979. The next prime is 123011155019. The reversal of 123011155015 is 510551110321.

It is not a de Polignac number, because 123011155015 - 2¹¹ = 123011152967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011155019) 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, 371541 + ... + 619729.

It is an arithmetic number, because the mean of its divisors is an integer number (3809716500).

Almost surely, 2^123011155015 is an apocalyptic number.

123011155015 is a deficient number, since it is larger than the sum of its proper divisors (59855236985).

123011155015 is an equidigital number, since it uses as much as digits as its factorization.

123011155015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248249 (or 248218 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 123011155015 its reverse (510551110321), we get a palindrome (633562265336).

The spelling of 123011155015 in words is "one hundred twenty-three billion, eleven million, one hundred fifty-five thousand, fifteen".