21210200022111 has 64 divisors (see below), whose sum is σ = 31289307955200. Its totient is φ = 12736522947456.

The previous prime is 21210200022073. The next prime is 21210200022149. The reversal of 21210200022111 is 11122000201212.

It is an interprime number because it is at equal distance from previous prime (21210200022073) and next prime (21210200022149).

It is not a de Polignac number, because 21210200022111 - 2¹⁴ = 21210200005727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210200022911) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14286180 + ... + 15700806.

It is an arithmetic number, because the mean of its divisors is an integer number (488895436800).

Almost surely, 2^{21210200022111} is an apocalyptic number.

21210200022111 is a deficient number, since it is larger than the sum of its proper divisors (10079107933089).

21210200022111 is a wasteful number, since it uses less digits than its factorization.

21210200022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414868.

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

Adding to 21210200022111 its reverse (11122000201212), we get a palindrome (32332200223323).

The spelling of 21210200022111 in words is "twenty-one trillion, two hundred ten billion, two hundred million, twenty-two thousand, one hundred eleven".