123102420540440 has 64 divisors (see below), whose sum is σ = 319934633081760. Its totient is φ = 42131309701120.

The previous prime is 123102420540433. The next prime is 123102420540481. The reversal of 123102420540440 is 44045024201321.

It is a junction number, because it is equal to n+sod(n) for n = 123102420540397 and 123102420540406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8228763947 + ... + 8228778906.

Almost surely, 2^{123102420540440} is an apocalyptic number.

123102420540440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123102420540440 is an abundant number, since it is smaller than the sum of its proper divisors (196832212541320).

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

123102420540440 is a wasteful number, since it uses less digits than its factorization.

123102420540440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16457542892 (or 16457542888 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 123102420540440 its reverse (44045024201321), we get a palindrome (167147444741761).

The spelling of 123102420540440 in words is "one hundred twenty-three trillion, one hundred two billion, four hundred twenty million, five hundred forty thousand, four hundred forty".