121200913 has 4 divisors (see below), whose sum is σ = 121538880. Its totient is φ = 120862948.

The previous prime is 121200907. The next prime is 121200941. The reversal of 121200913 is 319002121.

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 121200913 - 2⁵ = 121200881 is a prime.

It is a super-2 number, since 2×121200913² = 29379322624067138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121200953) 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, 168445 + ... + 169162.

It is an arithmetic number, because the mean of its divisors is an integer number (30384720).

Almost surely, 2^121200913 is an apocalyptic number.

It is an amenable number.

121200913 is a deficient number, since it is larger than the sum of its proper divisors (337967).

121200913 is an equidigital number, since it uses as much as digits as its factorization.

121200913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337966.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 121200913 is about 11009.1286212852. The cubic root of 121200913 is about 494.8823486671.

The spelling of 121200913 in words is "one hundred twenty-one million, two hundred thousand, nine hundred thirteen".