121512133020 has 24 divisors (see below), whose sum is σ = 340233972624. Its totient is φ = 32403235456.

The previous prime is 121512133013. The next prime is 121512133069. The reversal of 121512133020 is 20331215121.

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, 1012601049 + ... + 1012601168.

It is an arithmetic number, because the mean of its divisors is an integer number (14176415526).

Almost surely, 2^121512133020 is an apocalyptic number.

121512133020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121512133020 is an abundant number, since it is smaller than the sum of its proper divisors (218721839604).

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

121512133020 is a wasteful number, since it uses less digits than its factorization.

121512133020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025202229 (or 2025202227 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 121512133020 its reverse (20331215121), we get a palindrome (141843348141).

The spelling of 121512133020 in words is "one hundred twenty-one billion, five hundred twelve million, one hundred thirty-three thousand, twenty".