122106891 has 8 divisors (see below), whose sum is σ = 162860544. Its totient is φ = 81378920.

The previous prime is 122106889. The next prime is 122106947. The reversal of 122106891 is 198601221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122106891 - 2¹ = 122106889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122106851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13570 + ... + 20696.

It is an arithmetic number, because the mean of its divisors is an integer number (20357568).

Almost surely, 2^122106891 is an apocalyptic number.

122106891 is a deficient number, since it is larger than the sum of its proper divisors (40753653).

122106891 is an equidigital number, since it uses as much as digits as its factorization.

122106891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12841.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 122106891 is about 11050.1986859966. The cubic root of 122106891 is about 496.1123723779.

The spelling of 122106891 in words is "one hundred twenty-two million, one hundred six thousand, eight hundred ninety-one".