122311661 has 8 divisors (see below), whose sum is σ = 125217600. Its totient is φ = 119433600.

The previous prime is 122311639. The next prime is 122311667. The reversal of 122311661 is 166113221.

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 122311661 - 2¹⁰ = 122310637 is a prime.

It is a super-4 number, since 4×122311661⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122311667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2045 + ... + 15773.

It is an arithmetic number, because the mean of its divisors is an integer number (15652200).

Almost surely, 2^122311661 is an apocalyptic number.

It is an amenable number.

122311661 is a deficient number, since it is larger than the sum of its proper divisors (2905939).

122311661 is a wasteful number, since it uses less digits than its factorization.

122311661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13939.

The product of its digits is 432, while the sum is 23.

The square root of 122311661 is about 11059.4602490357. The cubic root of 122311661 is about 496.3895399077.

Adding to 122311661 its reverse (166113221), we get a palindrome (288424882).

The spelling of 122311661 in words is "one hundred twenty-two million, three hundred eleven thousand, six hundred sixty-one".