121198001 has 2 divisors, whose sum is σ = 121198002. Its totient is φ = 121198000.

The previous prime is 121197997. The next prime is 121198013. The reversal of 121198001 is 100891121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116618401 + 4579600 = 10799^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 121198001 - 2² = 121197997 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121198061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60599000 + 60599001.

It is an arithmetic number, because the mean of its divisors is an integer number (60599001).

Almost surely, 2^121198001 is an apocalyptic number.

It is an amenable number.

121198001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121198001 is an equidigital number, since it uses as much as digits as its factorization.

121198001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 121198001 is about 11008.9963666085. The cubic root of 121198001 is about 494.8783852511.

The spelling of 121198001 in words is "one hundred twenty-one million, one hundred ninety-eight thousand, one".