223132121 has 4 divisors (see below), whose sum is σ = 224300544. Its totient is φ = 221963700.

The previous prime is 223132069. The next prime is 223132139. The reversal of 223132121 is 121231322.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121231322 = 2 ⋅60615661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223132121 is a prime.

It is a super-3 number, since 3×223132121³ (a number of 26 digits) contains 333 as substring.

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 223132121.

It is not an unprimeable number, because it can be changed into a prime (223132421) 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, 583925 + ... + 584306.

It is an arithmetic number, because the mean of its divisors is an integer number (56075136).

Almost surely, 2^223132121 is an apocalyptic number.

It is an amenable number.

223132121 is a deficient number, since it is larger than the sum of its proper divisors (1168423).

223132121 is a wasteful number, since it uses less digits than its factorization.

223132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168422.

The product of its digits is 144, while the sum is 17.

The square root of 223132121 is about 14937.6076063070. The cubic root of 223132121 is about 606.5324364232.

Adding to 223132121 its reverse (121231322), we get a palindrome (344363443).

The spelling of 223132121 in words is "two hundred twenty-three million, one hundred thirty-two thousand, one hundred twenty-one".