22021220110021 has 16 divisors (see below), whose sum is σ = 24877668941568. Its totient is φ = 19319575579200.

The previous prime is 22021220109989. The next prime is 22021220110039. The reversal of 22021220110021 is 12001102212022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22021220110021 - 2⁵ = 22021220109989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021220109977 and 22021220110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021220110091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309573021 + ... + 309644146.

It is an arithmetic number, because the mean of its divisors is an integer number (1554854308848).

Almost surely, 2^{22021220110021} is an apocalyptic number.

It is an amenable number.

22021220110021 is a deficient number, since it is larger than the sum of its proper divisors (2856448831547).

22021220110021 is a wasteful number, since it uses less digits than its factorization.

22021220110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619217292.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22021220110021 its reverse (12001102212022), we get a palindrome (34022322322043).

The spelling of 22021220110021 in words is "twenty-two trillion, twenty-one billion, two hundred twenty million, one hundred ten thousand, twenty-one".