21021222012219 has 144 divisors (see below), whose sum is σ = 38223181432800. Its totient is φ = 11019989882880.

The previous prime is 21021222012191. The next prime is 21021222012223. The reversal of 21021222012219 is 91221022212012.

21021222012219 is a `hidden beast` number, since 2 + 1 + 0 + 212 + 220 + 1 + 221 + 9 = 666.

It is not a de Polignac number, because 21021222012219 - 2¹¹ = 21021222010171 is a prime.

It is a super-2 number, since 2×21021222012219² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021222012192 and 21021222012201.

It is not an unprimeable number, because it can be changed into a prime (21021222012239) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 54922492 + ... + 55303910.

It is an arithmetic number, because the mean of its divisors is an integer number (265438759950).

Almost surely, 2^{21021222012219} is an apocalyptic number.

21021222012219 is a deficient number, since it is larger than the sum of its proper divisors (17201959420581).

21021222012219 is a wasteful number, since it uses less digits than its factorization.

21021222012219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381706 (or 381692 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 21021222012219 in words is "twenty-one trillion, twenty-one billion, two hundred twenty-two million, twelve thousand, two hundred nineteen".