21211119 has 8 divisors (see below), whose sum is σ = 31423920. Its totient is φ = 14140728.

The previous prime is 21211109. The next prime is 21211139. The reversal of 21211119 is 91111212.

It is a happy number.

It is not a de Polignac number, because 21211119 - 2¹⁶ = 21145583 is a prime.

It is a super-2 number, since 2×21211119² = 899823138464322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392772 + ... + 392825.

It is an arithmetic number, because the mean of its divisors is an integer number (3927990).

Almost surely, 2^21211119 is an apocalyptic number.

21211119 is a deficient number, since it is larger than the sum of its proper divisors (10212801).

21211119 is an equidigital number, since it uses as much as digits as its factorization.

21211119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785606 (or 785600 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

The square root of 21211119 is about 4605.5530612512. The cubic root of 21211119 is about 276.8138783665.

It can be divided in two parts, 2121 and 1119, that added together give a triangular number (3240 = T₈₀).

The spelling of 21211119 in words is "twenty-one million, two hundred eleven thousand, one hundred nineteen".