122420151 has 24 divisors (see below), whose sum is σ = 202903584. Its totient is φ = 69672960.

The previous prime is 122420143. The next prime is 122420153. The reversal of 122420151 is 151024221.

It is not a de Polignac number, because 122420151 - 2³ = 122420143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122420153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12411 + ... + 19971.

It is an arithmetic number, because the mean of its divisors is an integer number (8454316).

Almost surely, 2^122420151 is an apocalyptic number.

122420151 is a deficient number, since it is larger than the sum of its proper divisors (80483433).

122420151 is a wasteful number, since it uses less digits than its factorization.

122420151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7831 (or 7828 counting only the distinct ones).

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

The square root of 122420151 is about 11064.3640124501. The cubic root of 122420151 is about 496.5362617766.

Adding to 122420151 its reverse (151024221), we get a palindrome (273444372).

The spelling of 122420151 in words is "one hundred twenty-two million, four hundred twenty thousand, one hundred fifty-one".