20221220101 has 4 divisors (see below), whose sum is σ = 20223509472. Its totient is φ = 20218930732.

The previous prime is 20221220093. The next prime is 20221220143. The reversal of 20221220101 is 10102212202.

It is a happy number.

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 20221220101 - 2³ = 20221220093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221220161) 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, 1131385 + ... + 1149118.

It is an arithmetic number, because the mean of its divisors is an integer number (5055877368).

Almost surely, 2^20221220101 is an apocalyptic number.

It is an amenable number.

20221220101 is a deficient number, since it is larger than the sum of its proper divisors (2289371).

20221220101 is an equidigital number, since it uses as much as digits as its factorization.

20221220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289370.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20221220101 its reverse (10102212202), we get a palindrome (30323432303).

The spelling of 20221220101 in words is "twenty billion, two hundred twenty-one million, two hundred twenty thousand, one hundred one".