123012240115440 has 160 divisors (see below), whose sum is σ = 414737689214016. Its totient is φ = 29980134604800.

The previous prime is 123012240115393. The next prime is 123012240115477. The reversal of 123012240115440 is 44511042210321.

It is a super-2 number, since 2×123012240115440² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 123012240115398 and 123012240115407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194868049 + ... + 195498288.

Almost surely, 2^{123012240115440} is an apocalyptic number.

123012240115440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123012240115440 is an abundant number, since it is smaller than the sum of its proper divisors (291725449098576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123012240115440 is a wasteful number, since it uses less digits than its factorization.

123012240115440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390366467 (or 390366461 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 123012240115440 its reverse (44511042210321), we get a palindrome (167523282325761).

The spelling of 123012240115440 in words is "one hundred twenty-three trillion, twelve billion, two hundred forty million, one hundred fifteen thousand, four hundred forty".