223013121 has 16 divisors (see below), whose sum is σ = 300742848. Its totient is φ = 146988800.

The previous prime is 223013117. The next prime is 223013137. The reversal of 223013121 is 121310322.

It is a cyclic number.

It is not a de Polignac number, because 223013121 - 2² = 223013117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223013121.

It is not an unprimeable number, because it can be changed into a prime (223013521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114526 + ... + 116456.

It is an arithmetic number, because the mean of its divisors is an integer number (18796428).

Almost surely, 2^223013121 is an apocalyptic number.

It is an amenable number.

223013121 is a deficient number, since it is larger than the sum of its proper divisors (77729727).

223013121 is a wasteful number, since it uses less digits than its factorization.

223013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 223013121 is about 14933.6238401803. The cubic root of 223013121 is about 606.4245927018.

Adding to 223013121 its reverse (121310322), we get a palindrome (344323443).

It can be divided in two parts, 2230 and 13121, that added together give a palindrome (15351).

The spelling of 223013121 in words is "two hundred twenty-three million, thirteen thousand, one hundred twenty-one".