211221110021219 has 4 divisors (see below), whose sum is σ = 212315519917896. Its totient is φ = 210126700124544.

The previous prime is 211221110021197. The next prime is 211221110021239. The reversal of 211221110021219 is 912120011122112.

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 211221110021219 - 2²⁴ = 211221093244003 is a prime.

It is a super-2 number, since 2×211221110021219² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211221110021239) 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, 547204948049 + ... + 547204948434.

It is an arithmetic number, because the mean of its divisors is an integer number (53078879979474).

Almost surely, 2^{211221110021219} is an apocalyptic number.

211221110021219 is a deficient number, since it is larger than the sum of its proper divisors (1094409896677).

211221110021219 is a wasteful number, since it uses less digits than its factorization.

211221110021219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094409896676.

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

The spelling of 211221110021219 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred ten million, twenty-one thousand, two hundred nineteen".