20220021001 has 4 divisors (see below), whose sum is σ = 20237589504. Its totient is φ = 20202452500.

The previous prime is 20220020999. The next prime is 20220021061. The reversal of 20220021001 is 10012002202.

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 20220021001 - 2¹ = 20220020999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20220021061) 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, 8782525 + ... + 8784826.

It is an arithmetic number, because the mean of its divisors is an integer number (5059397376).

Almost surely, 2^20220021001 is an apocalyptic number.

It is an amenable number.

20220021001 is a deficient number, since it is larger than the sum of its proper divisors (17568503).

20220021001 is a wasteful number, since it uses less digits than its factorization.

20220021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17568502.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20220021001 its reverse (10012002202), we get a palindrome (30232023203).

The spelling of 20220021001 in words is "twenty billion, two hundred twenty million, twenty-one thousand, one".