121563312412 has 48 divisors (see below), whose sum is σ = 217583229024. Its totient is φ = 59406048000.

The previous prime is 121563312401. The next prime is 121563312413. The reversal of 121563312412 is 214213365121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121563312413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94161487 + ... + 94162777.

It is an arithmetic number, because the mean of its divisors is an integer number (4532983938).

Almost surely, 2^121563312412 is an apocalyptic number.

It is an amenable number.

121563312412 is a deficient number, since it is larger than the sum of its proper divisors (96019916612).

121563312412 is a wasteful number, since it uses less digits than its factorization.

121563312412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710 (or 2708 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

Adding to 121563312412 its reverse (214213365121), we get a palindrome (335776677533).

The spelling of 121563312412 in words is "one hundred twenty-one billion, five hundred sixty-three million, three hundred twelve thousand, four hundred twelve".