21000002102211 has 16 divisors (see below), whose sum is σ = 30545561305728. Its totient is φ = 12727230792000.

The previous prime is 21000002102207. The next prime is 21000002102231. The reversal of 21000002102211 is 11220120000012.

It is not a de Polignac number, because 21000002102211 - 2² = 21000002102207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000002102231) 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, 10706775 + ... + 12515391.

It is an arithmetic number, because the mean of its divisors is an integer number (1909097581608).

Almost surely, 2^{21000002102211} is an apocalyptic number.

21000002102211 is a deficient number, since it is larger than the sum of its proper divisors (9545559203517).

21000002102211 is a wasteful number, since it uses less digits than its factorization.

21000002102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160482.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21000002102211 its reverse (11220120000012), we get a palindrome (32220122102223).

The spelling of 21000002102211 in words is "twenty-one trillion, two million, one hundred two thousand, two hundred eleven".