21103331219 has 4 divisors (see below), whose sum is σ = 21104419440. Its totient is φ = 21102243000.

The previous prime is 21103331213. The next prime is 21103331237. The reversal of 21103331219 is 91213330112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21103331219 - 2¹² = 21103327123 is a prime.

It is a super-2 number, since 2×21103331219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103331213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514484 + ... + 553985.

It is an arithmetic number, because the mean of its divisors is an integer number (5276104860).

Almost surely, 2^21103331219 is an apocalyptic number.

21103331219 is a deficient number, since it is larger than the sum of its proper divisors (1088221).

21103331219 is a wasteful number, since it uses less digits than its factorization.

21103331219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088220.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 21103331219 in words is "twenty-one billion, one hundred three million, three hundred thirty-one thousand, two hundred nineteen".