2320121331221 has 4 divisors (see below), whose sum is σ = 2369485614912. Its totient is φ = 2270757047532.

The previous prime is 2320121331217. The next prime is 2320121331251. The reversal of 2320121331221 is 1221331210232.

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 2320121331221 - 2² = 2320121331217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2320121331251) 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, 24682141775 + ... + 24682141868.

It is an arithmetic number, because the mean of its divisors is an integer number (592371403728).

Almost surely, 2^{2320121331221} is an apocalyptic number.

It is an amenable number.

2320121331221 is a deficient number, since it is larger than the sum of its proper divisors (49364283691).

2320121331221 is an equidigital number, since it uses as much as digits as its factorization.

2320121331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49364283690.

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

Adding to 2320121331221 its reverse (1221331210232), we get a palindrome (3541452541453).

The spelling of 2320121331221 in words is "two trillion, three hundred twenty billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-one".