21000022213321 has 16 divisors (see below), whose sum is σ = 22885035857280. Its totient is φ = 19195509231360.

The previous prime is 21000022213259. The next prime is 21000022213343. The reversal of 21000022213321 is 12331222000012.

It is a cyclic number.

It is not a de Polignac number, because 21000022213321 - 2⁹ = 21000022212809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000022223321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129758886 + ... + 129920623.

It is an arithmetic number, because the mean of its divisors is an integer number (1430314741080).

Almost surely, 2^{21000022213321} is an apocalyptic number.

It is an amenable number.

21000022213321 is a deficient number, since it is larger than the sum of its proper divisors (1885013643959).

21000022213321 is a wasteful number, since it uses less digits than its factorization.

21000022213321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259679664.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21000022213321 its reverse (12331222000012), we get a palindrome (33331244213333).

The spelling of 21000022213321 in words is "twenty-one trillion, twenty-two million, two hundred thirteen thousand, three hundred twenty-one".