20221221102101 has 4 divisors (see below), whose sum is σ = 20224817270112. Its totient is φ = 20217624934092.

The previous prime is 20221221102073. The next prime is 20221221102107. The reversal of 20221221102101 is 10120112212202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20221221102101 - 2¹⁴ = 20221221085717 is a prime.

It is a super-2 number, since 2×20221221102101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20221221102101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221221102107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1798075571 + ... + 1798086816.

It is an arithmetic number, because the mean of its divisors is an integer number (5056204317528).

Almost surely, 2^{20221221102101} is an apocalyptic number.

It is an amenable number.

20221221102101 is a deficient number, since it is larger than the sum of its proper divisors (3596168011).

20221221102101 is an equidigital number, since it uses as much as digits as its factorization.

20221221102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596168010.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20221221102101 its reverse (10120112212202), we get a palindrome (30341333314303).

The spelling of 20221221102101 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, one hundred one".