122205251 has 4 divisors (see below), whose sum is σ = 139663152. Its totient is φ = 104747352.

The previous prime is 122205203. The next prime is 122205263. The reversal of 122205251 is 152502221.

It is a happy number.

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 122205251 - 2¹⁰ = 122204227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122205851) 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, 8728940 + ... + 8728953.

It is an arithmetic number, because the mean of its divisors is an integer number (34915788).

Almost surely, 2^122205251 is an apocalyptic number.

122205251 is a deficient number, since it is larger than the sum of its proper divisors (17457901).

122205251 is an equidigital number, since it uses as much as digits as its factorization.

122205251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17457900.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 122205251 is about 11054.6483888001. The cubic root of 122205251 is about 496.2455467245.

Adding to 122205251 its reverse (152502221), we get a palindrome (274707472).

It can be divided in two parts, 12220 and 5251, that added together give a palindrome (17471).

The spelling of 122205251 in words is "one hundred twenty-two million, two hundred five thousand, two hundred fifty-one".