21220222002111 has 12 divisors (see below), whose sum is σ = 33437925579240. Its totient is φ = 12860740607280.

The previous prime is 21220222002079. The next prime is 21220222002113. The reversal of 21220222002111 is 11120022202212.

It is a happy number.

21220222002111 is a `hidden beast` number, since 212 + 20 + 2 + 220 + 0 + 211 + 1 = 666.

It is not a de Polignac number, because 21220222002111 - 2⁵ = 21220222002079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220222002113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107172838296 + ... + 107172838493.

It is an arithmetic number, because the mean of its divisors is an integer number (2786493798270).

Almost surely, 2^{21220222002111} is an apocalyptic number.

21220222002111 is a deficient number, since it is larger than the sum of its proper divisors (12217703577129).

21220222002111 is a wasteful number, since it uses less digits than its factorization.

21220222002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214345676806 (or 214345676803 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21220222002111 its reverse (11120022202212), we get a palindrome (32340244204323).

The spelling of 21220222002111 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, two thousand, one hundred eleven".