121090897 has 2 divisors, whose sum is σ = 121090898. Its totient is φ = 121090896.

The previous prime is 121090891. The next prime is 121090927. The reversal of 121090897 is 798090121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120978001 + 112896 = 10999^2 + 336^2 .

It is a cyclic number.

It is not a de Polignac number, because 121090897 - 2⁷ = 121090769 is a prime.

It is not a weakly prime, because it can be changed into another prime (121090891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60545448 + 60545449.

It is an arithmetic number, because the mean of its divisors is an integer number (60545449).

Almost surely, 2^121090897 is an apocalyptic number.

It is an amenable number.

121090897 is a deficient number, since it is larger than the sum of its proper divisors (1).

121090897 is an equidigital number, since it uses as much as digits as its factorization.

121090897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 121090897 is about 11004.1309061643. The cubic root of 121090897 is about 494.7325658067.

The spelling of 121090897 in words is "one hundred twenty-one million, ninety thousand, eight hundred ninety-seven".