21212210220219 has 6 divisors (see below), whose sum is σ = 30639859206996. Its totient is φ = 14141473480140.

The previous prime is 21212210220137. The next prime is 21212210220239. The reversal of 21212210220219 is 91202201221212.

21212210220219 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 221 + 0 + 220 + 219 = 666.

It is not a de Polignac number, because 21212210220219 - 2¹⁶ = 21212210154683 is a prime.

It is a super-2 number, since 2×21212210220219² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21212210220192 and 21212210220201.

It is not an unprimeable number, because it can be changed into a prime (21212210220239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1178456123337 + ... + 1178456123354.

It is an arithmetic number, because the mean of its divisors is an integer number (5106643201166).

Almost surely, 2^{21212210220219} is an apocalyptic number.

21212210220219 is a deficient number, since it is larger than the sum of its proper divisors (9427648986777).

21212210220219 is a wasteful number, since it uses less digits than its factorization.

21212210220219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356912246697 (or 2356912246694 counting only the distinct ones).

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

The spelling of 21212210220219 in words is "twenty-one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty thousand, two hundred nineteen".