233131213421 has 4 divisors (see below), whose sum is σ = 233484979200. Its totient is φ = 232777447644.

The previous prime is 233131213349. The next prime is 233131213423. The reversal of 233131213421 is 124312131332.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 233131213421 - 2¹⁰ = 233131212397 is a prime.

It is a super-2 number, since 2×233131213421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233131213423) 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, 176881901 + ... + 176883218.

It is an arithmetic number, because the mean of its divisors is an integer number (58371244800).

Almost surely, 2^233131213421 is an apocalyptic number.

It is an amenable number.

233131213421 is a deficient number, since it is larger than the sum of its proper divisors (353765779).

233131213421 is an equidigital number, since it uses as much as digits as its factorization.

233131213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353765778.

The product of its digits is 2592, while the sum is 26.

Adding to 233131213421 its reverse (124312131332), we get a palindrome (357443344753).

The spelling of 233131213421 in words is "two hundred thirty-three billion, one hundred thirty-one million, two hundred thirteen thousand, four hundred twenty-one".