2231213013221 has 8 divisors (see below), whose sum is σ = 2259678698880. Its totient is φ = 2202752889792.

The previous prime is 2231213013163. The next prime is 2231213013223. The reversal of 2231213013221 is 1223103121322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2231213013221 - 2⁶ = 2231213013157 is a prime.

It is a super-3 number, since 3×2231213013221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231213013223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580175 + ... + 2190668.

It is an arithmetic number, because the mean of its divisors is an integer number (282459837360).

Almost surely, 2^{2231213013221} is an apocalyptic number.

It is an amenable number.

2231213013221 is a deficient number, since it is larger than the sum of its proper divisors (28465685659).

2231213013221 is a wasteful number, since it uses less digits than its factorization.

2231213013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781115.

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

Adding to 2231213013221 its reverse (1223103121322), we get a palindrome (3454316134543).

The spelling of 2231213013221 in words is "two trillion, two hundred thirty-one billion, two hundred thirteen million, thirteen thousand, two hundred twenty-one".