122421151 has 4 divisors (see below), whose sum is σ = 126642600. Its totient is φ = 118199704.

The previous prime is 122421137. The next prime is 122421163. The reversal of 122421151 is 151124221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151124221 = 6037 ⋅25033.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122421151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122421751) 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, 2110681 + ... + 2110738.

It is an arithmetic number, because the mean of its divisors is an integer number (31660650).

Almost surely, 2^122421151 is an apocalyptic number.

122421151 is a deficient number, since it is larger than the sum of its proper divisors (4221449).

122421151 is an equidigital number, since it uses as much as digits as its factorization.

122421151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221448.

The product of its digits is 160, while the sum is 19.

The square root of 122421151 is about 11064.4092024834. The cubic root of 122421151 is about 496.5376137732.

Adding to 122421151 its reverse (151124221), we get a palindrome (273545372).

The spelling of 122421151 in words is "one hundred twenty-two million, four hundred twenty-one thousand, one hundred fifty-one".