20002212111001 has 4 divisors (see below), whose sum is σ = 20002650407604. Its totient is φ = 20001773814400.

The previous prime is 20002212110999. The next prime is 20002212111041. The reversal of 20002212111001 is 10011121220002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10750267137600 + 9251944973401 = 3278760^2 + 3041701^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002212111001 - 2¹ = 20002212110999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002212111041) 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, 219079840 + ... + 219171121.

It is an arithmetic number, because the mean of its divisors is an integer number (5000662601901).

Almost surely, 2^{20002212111001} is an apocalyptic number.

It is an amenable number.

20002212111001 is a deficient number, since it is larger than the sum of its proper divisors (438296603).

20002212111001 is an equidigital number, since it uses as much as digits as its factorization.

20002212111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438296602.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20002212111001 its reverse (10011121220002), we get a palindrome (30013333331003).

The spelling of 20002212111001 in words is "twenty trillion, two billion, two hundred twelve million, one hundred eleven thousand, one".