22011321021 has 4 divisors (see below), whose sum is σ = 29348428032. Its totient is φ = 14674214012.

The previous prime is 22011321019. The next prime is 22011321023. The reversal of 22011321021 is 12012311022.

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 an interprime number because it is at equal distance from previous prime (22011321019) and next prime (22011321023).

It is a cyclic number.

It is not a de Polignac number, because 22011321021 - 2¹ = 22011321019 is a prime.

It is a super-3 number, since 3×22011321021³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011321023) 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, 3668553501 + ... + 3668553506.

It is an arithmetic number, because the mean of its divisors is an integer number (7337107008).

Almost surely, 2^22011321021 is an apocalyptic number.

It is an amenable number.

22011321021 is a deficient number, since it is larger than the sum of its proper divisors (7337107011).

22011321021 is an equidigital number, since it uses as much as digits as its factorization.

22011321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7337107010.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 22011321021 its reverse (12012311022), we get a palindrome (34023632043).

Subtracting from 22011321021 its reverse (12012311022), we obtain a palindrome (9999009999).

The spelling of 22011321021 in words is "twenty-two billion, eleven million, three hundred twenty-one thousand, twenty-one".