2221140021 has 4 divisors (see below), whose sum is σ = 2961520032. Its totient is φ = 1480760012.

The previous prime is 2221139993. The next prime is 2221140029. The reversal of 2221140021 is 1200411222.

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 2221140021 - 2⁵ = 2221139989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221140029) 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, 370190001 + ... + 370190006.

It is an arithmetic number, because the mean of its divisors is an integer number (740380008).

Almost surely, 2^2221140021 is an apocalyptic number.

It is an amenable number.

2221140021 is a deficient number, since it is larger than the sum of its proper divisors (740380011).

2221140021 is an equidigital number, since it uses as much as digits as its factorization.

2221140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740380010.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2221140021 is about 47128.9722039427. The cubic root of 2221140021 is about 1304.7440122660.

Adding to 2221140021 its reverse (1200411222), we get a palindrome (3421551243).

The spelling of 2221140021 in words is "two billion, two hundred twenty-one million, one hundred forty thousand, twenty-one".