223012213121 has 4 divisors (see below), whose sum is σ = 226792081200. Its totient is φ = 219232345044.

The previous prime is 223012213103. The next prime is 223012213147. The reversal of 223012213121 is 121312210322.

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 223012213121 - 2¹⁸ = 223011950977 is a prime.

It is a super-2 number, since 2×223012213121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223012213093 and 223012213102.

It is not an unprimeable number, because it can be changed into a prime (223012213421) 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, 1889933951 + ... + 1889934068.

It is an arithmetic number, because the mean of its divisors is an integer number (56698020300).

Almost surely, 2^223012213121 is an apocalyptic number.

It is an amenable number.

223012213121 is a deficient number, since it is larger than the sum of its proper divisors (3779868079).

223012213121 is an equidigital number, since it uses as much as digits as its factorization.

223012213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779868078.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 223012213121 its reverse (121312210322), we get a palindrome (344324423443).

The spelling of 223012213121 in words is "two hundred twenty-three billion, twelve million, two hundred thirteen thousand, one hundred twenty-one".