121648031564 has 24 divisors (see below), whose sum is σ = 213887737728. Its totient is φ = 60537375360.

The previous prime is 121648031551. The next prime is 121648031623. The reversal of 121648031564 is 465130846121.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4658384 + ... + 4684424.

It is an arithmetic number, because the mean of its divisors is an integer number (8911989072).

Almost surely, 2^121648031564 is an apocalyptic number.

It is an amenable number.

121648031564 is a deficient number, since it is larger than the sum of its proper divisors (92239706164).

121648031564 is a wasteful number, since it uses less digits than its factorization.

121648031564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31505 (or 31503 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

Adding to 121648031564 its reverse (465130846121), we get a palindrome (586778877685).

The spelling of 121648031564 in words is "one hundred twenty-one billion, six hundred forty-eight million, thirty-one thousand, five hundred sixty-four".