121531103660 has 48 divisors (see below), whose sum is σ = 261512223840. Its totient is φ = 47413685760.

The previous prime is 121531103657. The next prime is 121531103689. The reversal of 121531103660 is 66301135121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3277142 + ... + 3314018.

It is an arithmetic number, because the mean of its divisors is an integer number (5448171330).

Almost surely, 2^121531103660 is an apocalyptic number.

121531103660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121531103660 is an abundant number, since it is smaller than the sum of its proper divisors (139981120180).

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

121531103660 is a wasteful number, since it uses less digits than its factorization.

121531103660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40946 (or 40944 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

Adding to 121531103660 its reverse (66301135121), we get a palindrome (187832238781).

The spelling of 121531103660 in words is "one hundred twenty-one billion, five hundred thirty-one million, one hundred three thousand, six hundred sixty".