21002200212111 has 16 divisors (see below), whose sum is σ = 29493540820224. Its totient is φ = 13267541887424.

The previous prime is 21002200212047. The next prime is 21002200212179. The reversal of 21002200212111 is 11121200220012.

It is a cyclic number.

It is not a de Polignac number, because 21002200212111 - 2⁶ = 21002200212047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002200212311) 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, 1422327726 + ... + 1422342491.

It is an arithmetic number, because the mean of its divisors is an integer number (1843346301264).

Almost surely, 2^{21002200212111} is an apocalyptic number.

21002200212111 is a deficient number, since it is larger than the sum of its proper divisors (8491340608113).

21002200212111 is a wasteful number, since it uses less digits than its factorization.

21002200212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844670350.

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

Adding to 21002200212111 its reverse (11121200220012), we get a palindrome (32123400432123).

The spelling of 21002200212111 in words is "twenty-one trillion, two billion, two hundred million, two hundred twelve thousand, one hundred eleven".