22001122021 has 4 divisors (see below), whose sum is σ = 22002368832. Its totient is φ = 21999875212.

The previous prime is 22001122019. The next prime is 22001122051. The reversal of 22001122021 is 12022110022.

It is a happy number.

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 22001122021 - 2¹ = 22001122019 is a prime.

It is a super-2 number, since 2×22001122021² (a number of 21 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 = 22001121992 and 22001122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001122051) 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, 596551 + ... + 632356.

It is an arithmetic number, because the mean of its divisors is an integer number (5500592208).

Almost surely, 2^22001122021 is an apocalyptic number.

It is an amenable number.

22001122021 is a deficient number, since it is larger than the sum of its proper divisors (1246811).

22001122021 is a wasteful number, since it uses less digits than its factorization.

22001122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246810.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22001122021 its reverse (12022110022), we get a palindrome (34023232043).

The spelling of 22001122021 in words is "twenty-two billion, one million, one hundred twenty-two thousand, twenty-one".