121513203140 has 48 divisors (see below), whose sum is σ = 292766527872. Its totient is φ = 41499549696.

The previous prime is 121513203107. The next prime is 121513203173. The reversal of 121513203140 is 41302315121.

It is an interprime number because it is at equal distance from previous prime (121513203107) and next prime (121513203173).

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, 1652642 + ... + 1724601.

It is an arithmetic number, because the mean of its divisors is an integer number (6099302664).

Almost surely, 2^121513203140 is an apocalyptic number.

121513203140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121513203140 is an abundant number, since it is smaller than the sum of its proper divisors (171253324732).

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

121513203140 is a wasteful number, since it uses less digits than its factorization.

121513203140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377516 (or 3377514 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 121513203140 its reverse (41302315121), we get a palindrome (162815518261).

The spelling of 121513203140 in words is "one hundred twenty-one billion, five hundred thirteen million, two hundred three thousand, one hundred forty".