22021231002221 has 8 divisors (see below), whose sum is σ = 24261014174688. Its totient is φ = 19821090010000.

The previous prime is 22021231002217. The next prime is 22021231002241. The reversal of 22021231002221 is 12220013212022.

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

It is a cyclic number.

It is not a de Polignac number, because 22021231002221 - 2² = 22021231002217 is a prime.

It is a super-2 number, since 2×22021231002221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021231002193 and 22021231002202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021231002241) 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, 9910543895 + ... + 9910546116.

It is an arithmetic number, because the mean of its divisors is an integer number (3032626771836).

Almost surely, 2^{22021231002221} is an apocalyptic number.

It is an amenable number.

22021231002221 is a deficient number, since it is larger than the sum of its proper divisors (2239783172467).

22021231002221 is a wasteful number, since it uses less digits than its factorization.

22021231002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19821090123.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22021231002221 its reverse (12220013212022), we get a palindrome (34241244214243).

The spelling of 22021231002221 in words is "twenty-two trillion, twenty-one billion, two hundred thirty-one million, two thousand, two hundred twenty-one".