21012122220219 has 40 divisors (see below), whose sum is σ = 34627440177792. Its totient is φ = 12615157779840.

The previous prime is 21012122220211. The next prime is 21012122220223. The reversal of 21012122220219 is 91202222121012.

21012122220219 is a `hidden beast` number, since 2 + 10 + 1 + 212 + 2 + 220 + 219 = 666.

It is not a de Polignac number, because 21012122220219 - 2³ = 21012122220211 is a prime.

It is a super-2 number, since 2×21012122220219² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21012122220192 and 21012122220201.

It is not an unprimeable number, because it can be changed into a prime (21012122220211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 243304779 + ... + 243391124.

Almost surely, 2^{21012122220219} is an apocalyptic number.

21012122220219 is a deficient number, since it is larger than the sum of its proper divisors (13615317957573).

21012122220219 is a wasteful number, since it uses less digits than its factorization.

21012122220219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486695969 (or 486695960 counting only the distinct ones).

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

The spelling of 21012122220219 in words is "twenty-one trillion, twelve billion, one hundred twenty-two million, two hundred twenty thousand, two hundred nineteen".