21210212111219 has 4 divisors (see below), whose sum is σ = 21350677092240. Its totient is φ = 21069747130200.

The previous prime is 21210212111113. The next prime is 21210212111227. The reversal of 21210212111219 is 91211121201212.

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 21210212111219 - 2²⁸ = 21209943675763 is a prime.

It is a super-2 number, since 2×21210212111219² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210212111299) 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, 70232490284 + ... + 70232490585.

It is an arithmetic number, because the mean of its divisors is an integer number (5337669273060).

Almost surely, 2^{21210212111219} is an apocalyptic number.

21210212111219 is a deficient number, since it is larger than the sum of its proper divisors (140464981021).

21210212111219 is a wasteful number, since it uses less digits than its factorization.

21210212111219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140464981020.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 21210212111219 in words is "twenty-one trillion, two hundred ten billion, two hundred twelve million, one hundred eleven thousand, two hundred nineteen".