121862691911 has 2 divisors, whose sum is σ = 121862691912. Its totient is φ = 121862691910.

The previous prime is 121862691901. The next prime is 121862691961. The reversal of 121862691911 is 119196268121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121862691911 - 2²⁶ = 121795583047 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121862691901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60931345955 + 60931345956.

It is an arithmetic number, because the mean of its divisors is an integer number (60931345956).

Almost surely, 2^121862691911 is an apocalyptic number.

121862691911 is a deficient number, since it is larger than the sum of its proper divisors (1).

121862691911 is an equidigital number, since it uses as much as digits as its factorization.

121862691911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 47.

The spelling of 121862691911 in words is "one hundred twenty-one billion, eight hundred sixty-two million, six hundred ninety-one thousand, nine hundred eleven".