122195491 has 4 divisors (see below), whose sum is σ = 133304184. Its totient is φ = 111086800.

The previous prime is 122195483. The next prime is 122195509. The reversal of 122195491 is 194591221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194591221 = 11 ⋅17690111.

It is not a de Polignac number, because 122195491 - 2³ = 122195483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122195461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5554330 + ... + 5554351.

It is an arithmetic number, because the mean of its divisors is an integer number (33326046).

Almost surely, 2^122195491 is an apocalyptic number.

122195491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122195491 is a deficient number, since it is larger than the sum of its proper divisors (11108693).

122195491 is a wasteful number, since it uses less digits than its factorization.

122195491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11108692.

The product of its digits is 6480, while the sum is 34.

The square root of 122195491 is about 11054.2069367278. The cubic root of 122195491 is about 496.2323353842.

The spelling of 122195491 in words is "one hundred twenty-two million, one hundred ninety-five thousand, four hundred ninety-one".