22101110220021 has 64 divisors (see below), whose sum is σ = 34633979584512. Its totient is φ = 12273094080000.

The previous prime is 22101110219977. The next prime is 22101110220053. The reversal of 22101110220021 is 12002201110122.

It is not a de Polignac number, because 22101110220021 - 2⁶ = 22101110219957 is a prime.

It is a super-4 number, since 4×22101110220021⁴ (a number of 54 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101110220061) 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, 1729209651 + ... + 1729222431.

It is an arithmetic number, because the mean of its divisors is an integer number (541155931008).

Almost surely, 2^{22101110220021} is an apocalyptic number.

22101110220021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22101110220021 is a deficient number, since it is larger than the sum of its proper divisors (12532869364491).

22101110220021 is a wasteful number, since it uses less digits than its factorization.

22101110220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20514.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22101110220021 its reverse (12002201110122), we get a palindrome (34103311330143).

The spelling of 22101110220021 in words is "twenty-two trillion, one hundred one billion, one hundred ten million, two hundred twenty thousand, twenty-one".