21022110001001 has 16 divisors (see below), whose sum is σ = 21302965232640. Its totient is φ = 20741920903440.

The previous prime is 21022110000967. The next prime is 21022110001051. The reversal of 21022110001001 is 10010001122012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022110001001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022110001051) 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, 404470946 + ... + 404522916.

It is an arithmetic number, because the mean of its divisors is an integer number (1331435327040).

Almost surely, 2^{21022110001001} is an apocalyptic number.

It is an amenable number.

21022110001001 is a deficient number, since it is larger than the sum of its proper divisors (280855231639).

21022110001001 is an equidigital number, since it uses as much as digits as its factorization.

21022110001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58276.

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

Adding to 21022110001001 its reverse (10010001122012), we get a palindrome (31032111123013).

The spelling of 21022110001001 in words is "twenty-one trillion, twenty-two billion, one hundred ten million, one thousand, one".