121315210432540 has 12 divisors (see below), whose sum is σ = 254761941908376. Its totient is φ = 48526084173008.

The previous prime is 121315210432477. The next prime is 121315210432553. The reversal of 121315210432540 is 45234012513121.

It is a junction number, because it is equal to n+sod(n) for n = 121315210432496 and 121315210432505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3032880260794 + ... + 3032880260833.

It is an arithmetic number, because the mean of its divisors is an integer number (21230161825698).

Almost surely, 2^{121315210432540} is an apocalyptic number.

121315210432540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121315210432540 is an abundant number, since it is smaller than the sum of its proper divisors (133446731475836).

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

121315210432540 is a wasteful number, since it uses less digits than its factorization.

121315210432540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6065760521636 (or 6065760521634 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 121315210432540 its reverse (45234012513121), we get a palindrome (166549222945661).

The spelling of 121315210432540 in words is "one hundred twenty-one trillion, three hundred fifteen billion, two hundred ten million, four hundred thirty-two thousand, five hundred forty".