121504091 has 2 divisors, whose sum is σ = 121504092. Its totient is φ = 121504090.

The previous prime is 121504087. The next prime is 121504099. The reversal of 121504091 is 190405121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (190405121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121504091 - 2² = 121504087 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121504099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60752045 + 60752046.

It is an arithmetic number, because the mean of its divisors is an integer number (60752046).

Almost surely, 2^121504091 is an apocalyptic number.

121504091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121504091 is an equidigital number, since it uses as much as digits as its factorization.

121504091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 121504091 is about 11022.8894124907. The cubic root of 121504091 is about 495.2946461954.

The spelling of 121504091 in words is "one hundred twenty-one million, five hundred four thousand, ninety-one".