121200021000013 has 4 divisors (see below), whose sum is σ = 121266945364608. Its totient is φ = 121133096635420.

The previous prime is 121200020999899. The next prime is 121200021000031. The reversal of 121200021000013 is 310000120002121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121200021000013 - 2⁹ = 121200020999501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121200020999957 and 121200021000002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200021040013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33462179581 + ... + 33462183202.

It is an arithmetic number, because the mean of its divisors is an integer number (30316736341152).

Almost surely, 2^{121200021000013} is an apocalyptic number.

It is an amenable number.

121200021000013 is a deficient number, since it is larger than the sum of its proper divisors (66924364595).

121200021000013 is an equidigital number, since it uses as much as digits as its factorization.

121200021000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66924364594.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121200021000013 its reverse (310000120002121), we get a palindrome (431200141002134).

The spelling of 121200021000013 in words is "one hundred twenty-one trillion, two hundred billion, twenty-one million, thirteen", and thus it is an aban number.