21001022002211 has 16 divisors (see below), whose sum is σ = 21540263426304. Its totient is φ = 20469935430144.

The previous prime is 21001022002171. The next prime is 21001022002273. The reversal of 21001022002211 is 11220022010012.

It is a cyclic number.

It is not a de Polignac number, because 21001022002211 - 2⁴² = 16602975491107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21001022005211) 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, 2478056 + ... + 6938501.

It is an arithmetic number, because the mean of its divisors is an integer number (1346266464144).

Almost surely, 2^{21001022002211} is an apocalyptic number.

21001022002211 is a deficient number, since it is larger than the sum of its proper divisors (539241424093).

21001022002211 is a wasteful number, since it uses less digits than its factorization.

21001022002211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9416990.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21001022002211 its reverse (11220022010012), we get a palindrome (32221044012223).

The spelling of 21001022002211 in words is "twenty-one trillion, one billion, twenty-two million, two thousand, two hundred eleven".