21212111119 has 16 divisors (see below), whose sum is σ = 23230382080. Its totient is φ = 19294238880.

The previous prime is 21212111101. The next prime is 21212111143. The reversal of 21212111119 is 91111121212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21212111119 - 2⁹ = 21212110607 is a prime.

It is a super-2 number, since 2×21212111119² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21212111119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212111419) 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, 66984 + ... + 216589.

It is an arithmetic number, because the mean of its divisors is an integer number (1451898880).

Almost surely, 2^21212111119 is an apocalyptic number.

21212111119 is a deficient number, since it is larger than the sum of its proper divisors (2018270961).

21212111119 is a wasteful number, since it uses less digits than its factorization.

21212111119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283750.

The product of its digits is 72, while the sum is 22.

The spelling of 21212111119 in words is "twenty-one billion, two hundred twelve million, one hundred eleven thousand, one hundred nineteen".