22111022021 has 4 divisors (see below), whose sum is σ = 24121114944. Its totient is φ = 20100929100.

The previous prime is 22111021997. The next prime is 22111022023. The reversal of 22111022021 is 12022011122.

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 a de Polignac number, because none of the positive numbers 2^k-22111022021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111021987 and 22111022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111022023) 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, 1005046445 + ... + 1005046466.

It is an arithmetic number, because the mean of its divisors is an integer number (6030278736).

Almost surely, 2^22111022021 is an apocalyptic number.

It is an amenable number.

22111022021 is a deficient number, since it is larger than the sum of its proper divisors (2010092923).

22111022021 is a wasteful number, since it uses less digits than its factorization.

22111022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010092922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22111022021 its reverse (12022011122), we get a palindrome (34133033143).

The spelling of 22111022021 in words is "twenty-two billion, one hundred eleven million, twenty-two thousand, twenty-one".