20221221101022 has 12 divisors (see below), whose sum is σ = 43812645718920. Its totient is φ = 6740407033668.

The previous prime is 20221221100999. The next prime is 20221221101051. The reversal of 20221221101022 is 22010112212202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1123401172279 = 20221221101022 / (2 + 0 + 2 + 2 + 1 + 2 + 2 + 1 + 1 + 0 + 1 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20221221100986 and 20221221101004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561700586122 + ... + 561700586157.

It is an arithmetic number, because the mean of its divisors is an integer number (3651053809910).

Almost surely, 2^{20221221101022} is an apocalyptic number.

20221221101022 is an abundant number, since it is smaller than the sum of its proper divisors (23591424617898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20221221101022 is a wasteful number, since it uses less digits than its factorization.

20221221101022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123401172287 (or 1123401172284 counting only the distinct ones).

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

Adding to 20221221101022 its reverse (22010112212202), we get a palindrome (42231333313224).

The spelling of 20221221101022 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, twenty-two".