223031312121 has 8 divisors (see below), whose sum is σ = 297392473984. Its totient is φ = 148678845840.

The previous prime is 223031312117. The next prime is 223031312131. The reversal of 223031312121 is 121213130322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 223031312121 - 2² = 223031312117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223031312131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2113810 + ... + 2216811.

It is an arithmetic number, because the mean of its divisors is an integer number (37174059248).

Almost surely, 2^223031312121 is an apocalyptic number.

It is an amenable number.

223031312121 is a deficient number, since it is larger than the sum of its proper divisors (74361161863).

223031312121 is a wasteful number, since it uses less digits than its factorization.

223031312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347791.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 223031312121 its reverse (121213130322), we get a palindrome (344244442443).

The spelling of 223031312121 in words is "two hundred twenty-three billion, thirty-one million, three hundred twelve thousand, one hundred twenty-one".