121431222097 has 2 divisors, whose sum is σ = 121431222098. Its totient is φ = 121431222096.

The previous prime is 121431222079. The next prime is 121431222161. The reversal of 121431222097 is 790222134121.

Together with previous prime (121431222079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76487646096 + 44943576001 = 276564^2 + 211999^2 .

It is a cyclic number.

It is not a de Polignac number, because 121431222097 - 2³⁵ = 87071483729 is a prime.

It is not a weakly prime, because it can be changed into another prime (121431222007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60715611048 + 60715611049.

It is an arithmetic number, because the mean of its divisors is an integer number (60715611049).

Almost surely, 2^121431222097 is an apocalyptic number.

It is an amenable number.

121431222097 is a deficient number, since it is larger than the sum of its proper divisors (1).

121431222097 is an equidigital number, since it uses as much as digits as its factorization.

121431222097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 121431222097 in words is "one hundred twenty-one billion, four hundred thirty-one million, two hundred twenty-two thousand, ninety-seven".