121312346040 has 48 divisors (see below), whose sum is σ = 394265125800. Its totient is φ = 32349958848.

The previous prime is 121312346011. The next prime is 121312346041. The reversal of 121312346040 is 40643213121.

It is a happy number.

121312346040 is a `hidden beast` number, since 1 + 2 + 1 + 31 + 23 + 4 + 604 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 121312345995 and 121312346013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312346041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168489010 + ... + 168489729.

Almost surely, 2^121312346040 is an apocalyptic number.

121312346040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121312346040 is an abundant number, since it is smaller than the sum of its proper divisors (272952779760).

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

121312346040 is a wasteful number, since it uses less digits than its factorization.

121312346040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336978756 (or 336978749 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 121312346040 its reverse (40643213121), we get a palindrome (161955559161).

The spelling of 121312346040 in words is "one hundred twenty-one billion, three hundred twelve million, three hundred forty-six thousand, forty".