122100491 has 4 divisors (see below), whose sum is σ = 127409232. Its totient is φ = 116791752.

The previous prime is 122100437. The next prime is 122100493. The reversal of 122100491 is 194001221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122100491 - 2⁶ = 122100427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122100493) 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, 2654336 + ... + 2654381.

It is an arithmetic number, because the mean of its divisors is an integer number (31852308).

Almost surely, 2^122100491 is an apocalyptic number.

122100491 is a deficient number, since it is larger than the sum of its proper divisors (5308741).

122100491 is an equidigital number, since it uses as much as digits as its factorization.

122100491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308740.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 122100491 is about 11049.9090946487. The cubic root of 122100491 is about 496.1037046316.

The spelling of 122100491 in words is "one hundred twenty-two million, one hundred thousand, four hundred ninety-one".