122101605 has 12 divisors (see below), whose sum is σ = 211642860. Its totient is φ = 65120832.

The previous prime is 122101601. The next prime is 122101607. The reversal of 122101605 is 506101221.

It can be written as a sum of positive squares in 2 ways, for example, as 61121124 + 60980481 = 7818^2 + 7809^2 .

It is not a de Polignac number, because 122101605 - 2² = 122101601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122101601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1356640 + ... + 1356729.

It is an arithmetic number, because the mean of its divisors is an integer number (17636905).

Almost surely, 2^122101605 is an apocalyptic number.

122101605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122101605 is a deficient number, since it is larger than the sum of its proper divisors (89541255).

122101605 is a wasteful number, since it uses less digits than its factorization.

122101605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713380 (or 2713377 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 122101605 is about 11049.9595021882. The cubic root of 122101605 is about 496.1052133830.

Adding to 122101605 its reverse (506101221), we get a palindrome (628202826).

The spelling of 122101605 in words is "one hundred twenty-two million, one hundred one thousand, six hundred five".