22011122220021 has 24 divisors (see below), whose sum is σ = 34689899112960. Its totient is φ = 13337879256000.

The previous prime is 22011122219963. The next prime is 22011122220029. The reversal of 22011122220021 is 12002222111022.

It is a happy number.

22011122220021 is a `hidden beast` number, since 220 + 1 + 1 + 1 + 222 + 200 + 21 = 666.

It is not a de Polignac number, because 22011122220021 - 2²² = 22011118025717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22011122219976 and 22011122220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011122220029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17685280 + ... + 18888921.

It is an arithmetic number, because the mean of its divisors is an integer number (1445412463040).

Almost surely, 2^{22011122220021} is an apocalyptic number.

It is an amenable number.

22011122220021 is a deficient number, since it is larger than the sum of its proper divisors (12678776892939).

22011122220021 is a wasteful number, since it uses less digits than its factorization.

22011122220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36580297 (or 36580294 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22011122220021 its reverse (12002222111022), we get a palindrome (34013344331043).

The spelling of 22011122220021 in words is "twenty-two trillion, eleven billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".