223121332121 has 4 divisors (see below), whose sum is σ = 223122753744. Its totient is φ = 223119910500.

The previous prime is 223121332117. The next prime is 223121332163. The reversal of 223121332121 is 121233121322.

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 223121332121 - 2² = 223121332117 is a prime.

It is a super-3 number, since 3×223121332121³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223121337121) 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, 441335 + ... + 800636.

It is an arithmetic number, because the mean of its divisors is an integer number (55780688436).

Almost surely, 2^223121332121 is an apocalyptic number.

It is an amenable number.

223121332121 is a deficient number, since it is larger than the sum of its proper divisors (1421623).

223121332121 is a wasteful number, since it uses less digits than its factorization.

223121332121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421622.

The product of its digits is 864, while the sum is 23.

Adding to 223121332121 its reverse (121233121322), we get a palindrome (344354453443).

The spelling of 223121332121 in words is "two hundred twenty-three billion, one hundred twenty-one million, three hundred thirty-two thousand, one hundred twenty-one".