122036209 has 3 divisors (see below), whose sum is σ = 122047257. Its totient is φ = 122025162.

The previous prime is 122036207. The next prime is 122036219. The reversal of 122036209 is 902630221.

It is a happy number.

The square root of 122036209 is 11047.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 122036209 - 2¹ = 122036207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122036207) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5524 + ... + 16570.

It is an arithmetic number, because the mean of its divisors is an integer number (40682419).

Almost surely, 2^122036209 is an apocalyptic number.

122036209 is the 11047-th square number.

122036209 is the 5524-th centered octagonal number.

It is an amenable number.

122036209 is a deficient number, since it is larger than the sum of its proper divisors (11048).

122036209 is an frugal number, since it uses more digits than its factorization.

122036209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22094 (or 11047 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The cubic root of 122036209 is about 496.0166284423.

Multiplying 122036209 by its sum of digits (25), we get a square (3050905225 = 55235²).

Multiplying 122036209 by its product of nonzero digits (1296), we get a square (158158926864 = 397692²).

The spelling of 122036209 in words is "one hundred twenty-two million, thirty-six thousand, two hundred nine".