121331238 has 32 divisors (see below), whose sum is σ = 281474304. Its totient is φ = 34147872.

The previous prime is 121331213. The next prime is 121331239. The reversal of 121331238 is 832133121.

It is a super-2 number, since 2×121331238² = 29442538629225288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331239) 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, 18745 + ... + 24372.

It is an arithmetic number, because the mean of its divisors is an integer number (8796072).

Almost surely, 2^121331238 is an apocalyptic number.

121331238 is an abundant number, since it is smaller than the sum of its proper divisors (160143066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121331238 is a wasteful number, since it uses less digits than its factorization.

121331238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43196.

The product of its digits is 864, while the sum is 24.

The square root of 121331238 is about 11015.0459826548. The cubic root of 121331238 is about 495.0596642702.

Adding to 121331238 its reverse (832133121), we get a palindrome (953464359).

The spelling of 121331238 in words is "one hundred twenty-one million, three hundred thirty-one thousand, two hundred thirty-eight".