121113415512 has 80 divisors (see below), whose sum is σ = 339755193360. Its totient is φ = 40308601536.

The previous prime is 121113415487. The next prime is 121113415583. The reversal of 121113415512 is 215514311121.

121113415512 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 134 + 15 + 512 = 666.

121113415512 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 274818 + ... + 563694.

It is an arithmetic number, because the mean of its divisors is an integer number (4246939917).

Almost surely, 2^121113415512 is an apocalyptic number.

121113415512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121113415512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169877596680).

121113415512 is an abundant number, since it is smaller than the sum of its proper divisors (218641777848).

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

121113415512 is a wasteful number, since it uses less digits than its factorization.

121113415512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289542 (or 289529 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

Adding to 121113415512 its reverse (215514311121), we get a palindrome (336627726633).

The spelling of 121113415512 in words is "one hundred twenty-one billion, one hundred thirteen million, four hundred fifteen thousand, five hundred twelve".