123237121 has 16 divisors (see below), whose sum is σ = 149324800. Its totient is φ = 99455040.

The previous prime is 123237113. The next prime is 123237133. The reversal of 123237121 is 121732321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123237121 - 2³ = 123237113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123237092 and 123237101.

It is not an unprimeable number, because it can be changed into a prime (123237221) 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, 355 + ... + 15703.

It is an arithmetic number, because the mean of its divisors is an integer number (9332800).

Almost surely, 2^123237121 is an apocalyptic number.

It is an amenable number.

123237121 is a deficient number, since it is larger than the sum of its proper divisors (26087679).

123237121 is a wasteful number, since it uses less digits than its factorization.

123237121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15424.

The product of its digits is 504, while the sum is 22.

The square root of 123237121 is about 11101.2215994457. The cubic root of 123237121 is about 497.6383575185.

Adding to 123237121 its reverse (121732321), we get a palindrome (244969442).

The spelling of 123237121 in words is "one hundred twenty-three million, two hundred thirty-seven thousand, one hundred twenty-one".