121222120210091 has 2 divisors, whose sum is σ = 121222120210092. Its totient is φ = 121222120210090.

The previous prime is 121222120210073. The next prime is 121222120210153. The reversal of 121222120210091 is 190012021222121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121222120210091 - 2¹⁸ = 121222119947947 is a prime.

It is a super-3 number, since 3×121222120210091³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121222120210091.

It is not a weakly prime, because it can be changed into another prime (121222120212091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611060105045 + 60611060105046.

It is an arithmetic number, because the mean of its divisors is an integer number (60611060105046).

Almost surely, 2^{121222120210091} is an apocalyptic number.

121222120210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222120210091 is an equidigital number, since it uses as much as digits as its factorization.

121222120210091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 121222120210091 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred ten thousand, ninety-one".