121413240200421 has 12 divisors (see below), whose sum is σ = 188865040311948. Its totient is φ = 74715840123264.

The previous prime is 121413240200381. The next prime is 121413240200431. The reversal of 121413240200421 is 124002042314121.

121413240200421 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 1 + 32 + 4 + 0 + 200 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9178391331396 + 112234848869025 = 3029586^2 + 10594095^2 .

It is not a de Polignac number, because 121413240200421 - 2⁷ = 121413240200293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121413240200431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 518860000740 + ... + 518860000973.

It is an arithmetic number, because the mean of its divisors is an integer number (15738753359329).

Almost surely, 2^{121413240200421} is an apocalyptic number.

It is an amenable number.

121413240200421 is a deficient number, since it is larger than the sum of its proper divisors (67451800111527).

121413240200421 is a wasteful number, since it uses less digits than its factorization.

121413240200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037720001732 (or 1037720001729 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 121413240200421 its reverse (124002042314121), we get a palindrome (245415282514542).

The spelling of 121413240200421 in words is "one hundred twenty-one trillion, four hundred thirteen billion, two hundred forty million, two hundred thousand, four hundred twenty-one".