122221251 has 16 divisors (see below), whose sum is σ = 186910720. Its totient is φ = 78851880.

The previous prime is 122221207. The next prime is 122221259. The reversal of 122221251 is 152122221.

It is not a de Polignac number, because 122221251 - 2⁹ = 122220739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122221259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72175 + ... + 73848.

It is an arithmetic number, because the mean of its divisors is an integer number (11681920).

Almost surely, 2^122221251 is an apocalyptic number.

122221251 is a deficient number, since it is larger than the sum of its proper divisors (64689469).

122221251 is a wasteful number, since it uses less digits than its factorization.

122221251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146063 (or 146057 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 122221251 is about 11055.3720425864. The cubic root of 122221251 is about 496.2672031378.

Adding to 122221251 its reverse (152122221), we get a palindrome (274343472).

The spelling of 122221251 in words is "one hundred twenty-two million, two hundred twenty-one thousand, two hundred fifty-one".