22111021021 has 4 divisors (see below), whose sum is σ = 22325691232. Its totient is φ = 21896350812.

The previous prime is 22111021007. The next prime is 22111021061. The reversal of 22111021021 is 12012011122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12012011122 = 2 ⋅6006005561.

It is a cyclic number.

It is not a de Polignac number, because 22111021021 - 2¹³ = 22111012829 is a prime.

It is a super-2 number, since 2×22111021021² (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 = 22111020992 and 22111021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111021061) 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, 107334951 + ... + 107335156.

It is an arithmetic number, because the mean of its divisors is an integer number (5581422808).

Almost surely, 2^22111021021 is an apocalyptic number.

It is an amenable number.

22111021021 is a deficient number, since it is larger than the sum of its proper divisors (214670211).

22111021021 is a wasteful number, since it uses less digits than its factorization.

22111021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214670210.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22111021021 its reverse (12012011122), we get a palindrome (34123032143).

The spelling of 22111021021 in words is "twenty-two billion, one hundred eleven million, twenty-one thousand, twenty-one".