2013232221 has 48 divisors (see below), whose sum is σ = 3904467840. Its totient is φ = 965381760.

The previous prime is 2013232217. The next prime is 2013232231. The reversal of 2013232221 is 1222323102.

It is not a de Polignac number, because 2013232221 - 2² = 2013232217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2013232194 and 2013232203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013232211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102726 + ... + 120743.

It is an arithmetic number, because the mean of its divisors is an integer number (81343080).

Almost surely, 2^2013232221 is an apocalyptic number.

2013232221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2013232221 is a deficient number, since it is larger than the sum of its proper divisors (1891235619).

2013232221 is a wasteful number, since it uses less digits than its factorization.

2013232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223506 (or 223503 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2013232221 is about 44869.0563863338. The cubic root of 2013232221 is about 1262.6935367908.

Adding to 2013232221 its reverse (1222323102), we get a palindrome (3235555323).

The spelling of 2013232221 in words is "two billion, thirteen million, two hundred thirty-two thousand, two hundred twenty-one".