122516221 has 4 divisors (see below), whose sum is σ = 122685472. Its totient is φ = 122346972.

The previous prime is 122516209. The next prime is 122516227. The reversal of 122516221 is 122615221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122516221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122516192 and 122516201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122516227) 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, 83535 + ... + 84988.

It is an arithmetic number, because the mean of its divisors is an integer number (30671368).

Almost surely, 2^122516221 is an apocalyptic number.

It is an amenable number.

122516221 is a deficient number, since it is larger than the sum of its proper divisors (169251).

122516221 is an equidigital number, since it uses as much as digits as its factorization.

122516221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169250.

The product of its digits is 480, while the sum is 22.

The square root of 122516221 is about 11068.7045764172. The cubic root of 122516221 is about 496.6661144887. Note that the first 3 decimals are identical.

The spelling of 122516221 in words is "one hundred twenty-two million, five hundred sixteen thousand, two hundred twenty-one".