122106661 has 4 divisors (see below), whose sum is σ = 122739532. Its totient is φ = 121473792.

The previous prime is 122106659. The next prime is 122106683. The reversal of 122106661 is 166601221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11730625 + 110376036 = 3425^2 + 10506^2 .

It is a cyclic number.

It is not a de Polignac number, because 122106661 - 2¹ = 122106659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122106601) 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, 316146 + ... + 316531.

It is an arithmetic number, because the mean of its divisors is an integer number (30684883).

Almost surely, 2^122106661 is an apocalyptic number.

It is an amenable number.

122106661 is a deficient number, since it is larger than the sum of its proper divisors (632871).

122106661 is an equidigital number, since it uses as much as digits as its factorization.

122106661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632870.

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

The square root of 122106661 is about 11050.1882789390. The cubic root of 122106661 is about 496.1120608860.

Adding to 122106661 its reverse (166601221), we get a palindrome (288707882).

The spelling of 122106661 in words is "one hundred twenty-two million, one hundred six thousand, six hundred sixty-one".