122860891 has 2 divisors, whose sum is σ = 122860892. Its totient is φ = 122860890.

The previous prime is 122860889. The next prime is 122860901. The reversal of 122860891 is 198068221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122860891 - 2¹ = 122860889 is a prime.

Together with 122860889, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 122860891.

It is not a weakly prime, because it can be changed into another prime (122860391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61430445 + 61430446.

It is an arithmetic number, because the mean of its divisors is an integer number (61430446).

Almost surely, 2^122860891 is an apocalyptic number.

122860891 is a deficient number, since it is larger than the sum of its proper divisors (1).

122860891 is an equidigital number, since it uses as much as digits as its factorization.

122860891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 122860891 is about 11084.2632141248. The cubic root of 122860891 is about 497.1314287373.

The spelling of 122860891 in words is "one hundred twenty-two million, eight hundred sixty thousand, eight hundred ninety-one".