122010030001991 has 2 divisors, whose sum is σ = 122010030001992. Its totient is φ = 122010030001990.

The previous prime is 122010030001973. The next prime is 122010030002083. The reversal of 122010030001991 is 199100030010221.

It is a weak prime.

It is an emirp because it is prime and its reverse (199100030010221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122010030001991 - 2¹⁸ = 122010029739847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122010030001901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61005015000995 + 61005015000996.

It is an arithmetic number, because the mean of its divisors is an integer number (61005015000996).

Almost surely, 2^{122010030001991} is an apocalyptic number.

122010030001991 is a deficient number, since it is larger than the sum of its proper divisors (1).

122010030001991 is an equidigital number, since it uses as much as digits as its factorization.

122010030001991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 122010030001991 in words is "one hundred twenty-two trillion, ten billion, thirty million, one thousand, nine hundred ninety-one".