21202102100211 has 16 divisors (see below), whose sum is σ = 30353962249728. Its totient is φ = 13115909609600.

The previous prime is 21202102100209. The next prime is 21202102100213. The reversal of 21202102100211 is 11200120120212.

It is an interprime number because it is at equal distance from previous prime (21202102100209) and next prime (21202102100213).

It is a cyclic number.

It is not a de Polignac number, because 21202102100211 - 2¹ = 21202102100209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202102100213) 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, 2927654775 + ... + 2927662016.

It is an arithmetic number, because the mean of its divisors is an integer number (1897122640608).

Almost surely, 2^{21202102100211} is an apocalyptic number.

21202102100211 is a deficient number, since it is larger than the sum of its proper divisors (9151860149517).

21202102100211 is a wasteful number, since it uses less digits than its factorization.

21202102100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5855316882.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21202102100211 its reverse (11200120120212), we get a palindrome (32402222220423).

The spelling of 21202102100211 in words is "twenty-one trillion, two hundred two billion, one hundred two million, one hundred thousand, two hundred eleven".