20211000222001 has 6 divisors (see below), whose sum is σ = 21127945412210. Its totient is φ = 19332261081408.

The previous prime is 20211000221987. The next prime is 20211000222019. The reversal of 20211000222001 is 10022200011202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14847959423025 + 5363040798976 = 3853305^2 + 2315824^2 .

It is not a de Polignac number, because 20211000222001 - 2⁷ = 20211000221873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20211000222041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19103024256 + ... + 19103025313.

Almost surely, 2^{20211000222001} is an apocalyptic number.

It is an amenable number.

20211000222001 is a deficient number, since it is larger than the sum of its proper divisors (916945190209).

20211000222001 is an equidigital number, since it uses as much as digits as its factorization.

20211000222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38206049615 (or 38206049592 counting only the distinct ones).

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

Adding to 20211000222001 its reverse (10022200011202), we get a palindrome (30233200233203).

The spelling of 20211000222001 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two thousand, one".