121198601 has 2 divisors, whose sum is σ = 121198602. Its totient is φ = 121198600.

The previous prime is 121198591. The next prime is 121198603. The reversal of 121198601 is 106891121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 56235001 = 8060^2 + 7499^2 .

It is a cyclic number.

It is not a de Polignac number, because 121198601 - 2¹⁰ = 121197577 is a prime.

Together with 121198603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121198603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60599300 + 60599301.

It is an arithmetic number, because the mean of its divisors is an integer number (60599301).

Almost surely, 2^121198601 is an apocalyptic number.

It is an amenable number.

121198601 is a deficient number, since it is larger than the sum of its proper divisors (1).

121198601 is an equidigital number, since it uses as much as digits as its factorization.

121198601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 29.

The square root of 121198601 is about 11009.0236170153. The cubic root of 121198601 is about 494.8792018942.

The spelling of 121198601 in words is "one hundred twenty-one million, one hundred ninety-eight thousand, six hundred one".