21213122131219 has 2 divisors, whose sum is σ = 21213122131220. Its totient is φ = 21213122131218.

The previous prime is 21213122131181. The next prime is 21213122131237. The reversal of 21213122131219 is 91213122131212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21213122131219 - 2¹³ = 21213122123027 is a prime.

It is a super-2 number, since 2×21213122131219² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21213122131259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606561065609 + 10606561065610.

It is an arithmetic number, because the mean of its divisors is an integer number (10606561065610).

Almost surely, 2^{21213122131219} is an apocalyptic number.

21213122131219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213122131219 is an equidigital number, since it uses as much as digits as its factorization.

21213122131219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

The spelling of 21213122131219 in words is "twenty-one trillion, two hundred thirteen billion, one hundred twenty-two million, one hundred thirty-one thousand, two hundred nineteen".