20221220001 has 4 divisors (see below), whose sum is σ = 26961626672. Its totient is φ = 13480813332.

The previous prime is 20221219979. The next prime is 20221220023. The reversal of 20221220001 is 10002212202.

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 an interprime number because it is at equal distance from previous prime (20221219979) and next prime (20221220023).

It is not a de Polignac number, because 20221220001 - 2¹³ = 20221211809 is a prime.

It is a super-3 number, since 3×20221220001³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221225001) 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, 3370203331 + ... + 3370203336.

It is an arithmetic number, because the mean of its divisors is an integer number (6740406668).

Almost surely, 2^20221220001 is an apocalyptic number.

It is an amenable number.

20221220001 is a deficient number, since it is larger than the sum of its proper divisors (6740406671).

20221220001 is an equidigital number, since it uses as much as digits as its factorization.

20221220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6740406670.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20221220001 its reverse (10002212202), we get a palindrome (30223432203).

The spelling of 20221220001 in words is "twenty billion, two hundred twenty-one million, two hundred twenty thousand, one".