2221021321313 has 4 divisors (see below), whose sum is σ = 2221214146560. Its totient is φ = 2220828496068.

The previous prime is 2221021321283. The next prime is 2221021321367. The reversal of 2221021321313 is 3131231201222.

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 2221021321313 - 2¹⁶ = 2221021255777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221021321373) 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, 96395345 + ... + 96418382.

It is an arithmetic number, because the mean of its divisors is an integer number (555303536640).

Almost surely, 2^{2221021321313} is an apocalyptic number.

It is an amenable number.

2221021321313 is a deficient number, since it is larger than the sum of its proper divisors (192825247).

2221021321313 is a wasteful number, since it uses less digits than its factorization.

2221021321313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192825246.

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

Adding to 2221021321313 its reverse (3131231201222), we get a palindrome (5352252522535).

The spelling of 2221021321313 in words is "two trillion, two hundred twenty-one billion, twenty-one million, three hundred twenty-one thousand, three hundred thirteen".