121200491 has 2 divisors, whose sum is σ = 121200492. Its totient is φ = 121200490.

The previous prime is 121200481. The next prime is 121200517. The reversal of 121200491 is 194002121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121200491 - 2¹⁰ = 121199467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121200461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600245 + 60600246.

It is an arithmetic number, because the mean of its divisors is an integer number (60600246).

Almost surely, 2^121200491 is an apocalyptic number.

121200491 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200491 is an equidigital number, since it uses as much as digits as its factorization.

121200491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 121200491 is about 11009.1094553556. The cubic root of 121200491 is about 494.8817743024.

The spelling of 121200491 in words is "one hundred twenty-one million, two hundred thousand, four hundred ninety-one".