122231491 has 4 divisors (see below), whose sum is σ = 126446400. Its totient is φ = 118016584.

The previous prime is 122231489. The next prime is 122231497. The reversal of 122231491 is 194132221.

122231491 = 2039² + 2040² + ... + 2067².

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 122231491 - 2¹ = 122231489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122231497) 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 3 ways as a sum of consecutive naturals, for example, 2107411 + ... + 2107468.

It is an arithmetic number, because the mean of its divisors is an integer number (31611600).

Almost surely, 2^122231491 is an apocalyptic number.

122231491 is a deficient number, since it is larger than the sum of its proper divisors (4214909).

122231491 is an equidigital number, since it uses as much as digits as its factorization.

122231491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214908.

The product of its digits is 864, while the sum is 25.

The square root of 122231491 is about 11055.8351561517. The cubic root of 122231491 is about 496.2810622504.

The spelling of 122231491 in words is "one hundred twenty-two million, two hundred thirty-one thousand, four hundred ninety-one".