20001022111001 has 16 divisors (see below), whose sum is σ = 20242640208000. Its totient is φ = 19760979034368.

The previous prime is 20001022110961. The next prime is 20001022111003. The reversal of 20001022111001 is 10011122010002.

It is a cyclic number.

It is not a de Polignac number, because 20001022111001 - 2³⁴ = 19983842241817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001022111003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48314270 + ... + 48726488.

It is an arithmetic number, because the mean of its divisors is an integer number (1265165013000).

Almost surely, 2^{20001022111001} is an apocalyptic number.

It is an amenable number.

20001022111001 is a deficient number, since it is larger than the sum of its proper divisors (241618096999).

20001022111001 is a wasteful number, since it uses less digits than its factorization.

20001022111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414128.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20001022111001 its reverse (10011122010002), we get a palindrome (30012144121003).

The spelling of 20001022111001 in words is "twenty trillion, one billion, twenty-two million, one hundred eleven thousand, one".