2224121021 has 4 divisors (see below), whose sum is σ = 2224303200. Its totient is φ = 2223938844.

The previous prime is 2224120993. The next prime is 2224121047. The reversal of 2224121021 is 1201214222.

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 2224121021 - 2¹⁸ = 2223858877 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 (2224121821) 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, 71351 + ... + 97668.

It is an arithmetic number, because the mean of its divisors is an integer number (556075800).

Almost surely, 2^2224121021 is an apocalyptic number.

It is an amenable number.

2224121021 is a deficient number, since it is larger than the sum of its proper divisors (182179).

2224121021 is a wasteful number, since it uses less digits than its factorization.

2224121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182178.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2224121021 is about 47160.5875811572. The cubic root of 2224121021 is about 1305.3274518734.

Adding to 2224121021 its reverse (1201214222), we get a palindrome (3425335243).

The spelling of 2224121021 in words is "two billion, two hundred twenty-four million, one hundred twenty-one thousand, twenty-one".