2221421310021 has 8 divisors (see below), whose sum is σ = 2962042599040. Its totient is φ = 1480873780512.

The previous prime is 2221421309981. The next prime is 2221421310023. The reversal of 2221421310021 is 1200131241222.

It is a happy number.

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

It is not a de Polignac number, because 2221421310021 - 2⁶ = 2221421309957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221421310021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221421310023) 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, 18369565 + ... + 18490098.

It is an arithmetic number, because the mean of its divisors is an integer number (370255324880).

Almost surely, 2^{2221421310021} is an apocalyptic number.

It is an amenable number.

2221421310021 is a deficient number, since it is larger than the sum of its proper divisors (740621289019).

2221421310021 is a wasteful number, since it uses less digits than its factorization.

2221421310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36879755.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2221421310021 its reverse (1200131241222), we get a palindrome (3421552551243).

The spelling of 2221421310021 in words is "two trillion, two hundred twenty-one billion, four hundred twenty-one million, three hundred ten thousand, twenty-one".