121536641510 has 16 divisors (see below), whose sum is σ = 218770873056. Its totient is φ = 48613563648.

The previous prime is 121536641491. The next prime is 121536641533. The reversal of 121536641510 is 15146635121.

It is a congruent number.

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, 450614 + ... + 667926.

It is an arithmetic number, because the mean of its divisors is an integer number (13673179566).

Almost surely, 2^121536641510 is an apocalyptic number.

121536641510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121536641510 is a deficient number, since it is larger than the sum of its proper divisors (97234231546).

121536641510 is a wasteful number, since it uses less digits than its factorization.

121536641510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273247.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 121536641510 in words is "one hundred twenty-one billion, five hundred thirty-six million, six hundred forty-one thousand, five hundred ten".