22101220120021 has 8 divisors (see below), whose sum is σ = 25259098181504. Its totient is φ = 18943482283920.

The previous prime is 22101220119973. The next prime is 22101220120081. The reversal of 22101220120021 is 12002102210122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22101220120021 - 2¹⁵ = 22101220087253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22101220119977 and 22101220120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101220120081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34718385 + ... + 35349238.

It is an arithmetic number, because the mean of its divisors is an integer number (3157387272688).

Almost surely, 2^{22101220120021} is an apocalyptic number.

It is an amenable number.

22101220120021 is a deficient number, since it is larger than the sum of its proper divisors (3157878061483).

22101220120021 is an equidigital number, since it uses as much as digits as its factorization.

22101220120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70112691.

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

Adding to 22101220120021 its reverse (12002102210122), we get a palindrome (34103322330143).

The spelling of 22101220120021 in words is "twenty-two trillion, one hundred one billion, two hundred twenty million, one hundred twenty thousand, twenty-one".