22211000021 has 64 divisors (see below), whose sum is σ = 27918950400. Its totient is φ = 17241928704.

The previous prime is 22210999913. The next prime is 22211000023. The reversal of 22211000021 is 12000011222.

It is a happy number.

It is not a de Polignac number, because 22211000021 - 2²⁶ = 22143891157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22210999966 and 22211000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211000023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112746095 + ... + 112746291.

It is an arithmetic number, because the mean of its divisors is an integer number (436233600).

Almost surely, 2^22211000021 is an apocalyptic number.

It is an amenable number.

22211000021 is a deficient number, since it is larger than the sum of its proper divisors (5707950379).

22211000021 is a wasteful number, since it uses less digits than its factorization.

22211000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22211000021 its reverse (12000011222), we get a palindrome (34211011243).

The spelling of 22211000021 in words is "twenty-two billion, two hundred eleven million, twenty-one", and thus it is an aban number.