97155610121 has 2 divisors, whose sum is σ = 97155610122. Its totient is φ = 97155610120.

The previous prime is 97155610091. The next prime is 97155610151. The reversal of 97155610121 is 12101655179.

It is a balanced prime because it is at equal distance from previous prime (97155610091) and next prime (97155610151).

It can be written as a sum of positive squares in only one way, i.e., 95443305721 + 1712304400 = 308939^2 + 41380^2 .

It is an emirp because it is prime and its reverse (12101655179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97155610121 - 2¹⁰ = 97155609097 is a prime.

It is not a weakly prime, because it can be changed into another prime (97155610151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48577805060 + 48577805061.

It is an arithmetic number, because the mean of its divisors is an integer number (48577805061).

Almost surely, 2^97155610121 is an apocalyptic number.

It is an amenable number.

97155610121 is a deficient number, since it is larger than the sum of its proper divisors (1).

97155610121 is an equidigital number, since it uses as much as digits as its factorization.

97155610121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 38.

The spelling of 97155610121 in words is "ninety-seven billion, one hundred fifty-five million, six hundred ten thousand, one hundred twenty-one".