121562197 has 2 divisors, whose sum is σ = 121562198. Its totient is φ = 121562196.

The previous prime is 121562183. The next prime is 121562219. The reversal of 121562197 is 791265121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76282756 + 45279441 = 8734^2 + 6729^2 .

It is an emirp because it is prime and its reverse (791265121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121562197 - 2²³ = 113173589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121562137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60781098 + 60781099.

It is an arithmetic number, because the mean of its divisors is an integer number (60781099).

Almost surely, 2^121562197 is an apocalyptic number.

It is an amenable number.

121562197 is a deficient number, since it is larger than the sum of its proper divisors (1).

121562197 is an equidigital number, since it uses as much as digits as its factorization.

121562197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 34.

The square root of 121562197 is about 11025.5247947660. The cubic root of 121562197 is about 495.3735873076.

The spelling of 121562197 in words is "one hundred twenty-one million, five hundred sixty-two thousand, one hundred ninety-seven".