212021221219 has 4 divisors (see below), whose sum is σ = 212022234880. Its totient is φ = 212020207560.

The previous prime is 212021221207. The next prime is 212021221283. The reversal of 212021221219 is 912122120212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212021221219 - 2⁵ = 212021221187 is a prime.

It is a super-2 number, since 2×212021221219² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021221193 and 212021221202.

It is not an unprimeable number, because it can be changed into a prime (212021221289) 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, 64272 + ... + 654349.

It is an arithmetic number, because the mean of its divisors is an integer number (53005558720).

Almost surely, 2^212021221219 is an apocalyptic number.

212021221219 is a deficient number, since it is larger than the sum of its proper divisors (1013661).

212021221219 is an equidigital number, since it uses as much as digits as its factorization.

212021221219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013660.

The product of its (nonzero) digits is 576, while the sum is 25.

It can be divided in two parts, 21202 and 1221219, that added together give a palindrome (1242421).

The spelling of 212021221219 in words is "two hundred twelve billion, twenty-one million, two hundred twenty-one thousand, two hundred nineteen".