122016491 has 4 divisors (see below), whose sum is σ = 125314272. Its totient is φ = 118718712.

The previous prime is 122016473. The next prime is 122016511. The reversal of 122016491 is 194610221.

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 122016491 - 2¹⁴ = 122000107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122016491.

It is not an unprimeable number, because it can be changed into a prime (122016691) 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, 1648835 + ... + 1648908.

It is an arithmetic number, because the mean of its divisors is an integer number (31328568).

Almost surely, 2^122016491 is an apocalyptic number.

122016491 is a deficient number, since it is larger than the sum of its proper divisors (3297781).

122016491 is an equidigital number, since it uses as much as digits as its factorization.

122016491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297780.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 122016491 is about 11046.1075044560. The cubic root of 122016491 is about 495.9899123751.

The spelling of 122016491 in words is "one hundred twenty-two million, sixteen thousand, four hundred ninety-one".