21112222002111 has 24 divisors (see below), whose sum is σ = 30797920726560. Its totient is φ = 13935209400000.

The previous prime is 21112222002077. The next prime is 21112222002119. The reversal of 21112222002111 is 11120022221112.

21112222002111 is a `hidden beast` number, since 21 + 11 + 222 + 200 + 211 + 1 = 666.

It is not a de Polignac number, because 21112222002111 - 2¹¹ = 21112222000063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112222002119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59844486 + ... + 60196236.

It is an arithmetic number, because the mean of its divisors is an integer number (1283246696940).

Almost surely, 2^{21112222002111} is an apocalyptic number.

21112222002111 is a deficient number, since it is larger than the sum of its proper divisors (9685698724449).

21112222002111 is a wasteful number, since it uses less digits than its factorization.

21112222002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417887 (or 417884 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21112222002111 its reverse (11120022221112), we get a palindrome (32232244223223).

The spelling of 21112222002111 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, two thousand, one hundred eleven".