231121002223 has 4 divisors (see below), whose sum is σ = 231122957800. Its totient is φ = 231119046648.

The previous prime is 231121002209. The next prime is 231121002283. The reversal of 231121002223 is 322200121132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231121002223 - 2⁹ = 231121001711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231121002223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231121002283) 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, 788265 + ... + 1040962.

It is an arithmetic number, because the mean of its divisors is an integer number (57780739450).

Almost surely, 2^231121002223 is an apocalyptic number.

231121002223 is a deficient number, since it is larger than the sum of its proper divisors (1955577).

231121002223 is a wasteful number, since it uses less digits than its factorization.

231121002223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955576.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 231121002223 its reverse (322200121132), we get a palindrome (553321123355).

The spelling of 231121002223 in words is "two hundred thirty-one billion, one hundred twenty-one million, two thousand, two hundred twenty-three".