123221151 has 24 divisors (see below), whose sum is σ = 188972784. Its totient is φ = 77103360.

The previous prime is 123221149. The next prime is 123221173. The reversal of 123221151 is 151122321.

It is not a de Polignac number, because 123221151 - 2¹ = 123221149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221141) 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, 69660 + ... + 71406.

It is an arithmetic number, because the mean of its divisors is an integer number (7873866).

Almost surely, 2^123221151 is an apocalyptic number.

123221151 is a deficient number, since it is larger than the sum of its proper divisors (65751633).

123221151 is a wasteful number, since it uses less digits than its factorization.

123221151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231 (or 2228 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 123221151 is about 11100.5022859328. The cubic root of 123221151 is about 497.6168606735.

Adding to 123221151 its reverse (151122321), we get a palindrome (274343472).

The spelling of 123221151 in words is "one hundred twenty-three million, two hundred twenty-one thousand, one hundred fifty-one".