321121212019 has 2 divisors, whose sum is σ = 321121212020. Its totient is φ = 321121212018.

The previous prime is 321121212001. The next prime is 321121212043. The reversal of 321121212019 is 910212121123.

It is a weak prime.

It is an emirp because it is prime and its reverse (910212121123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321121212019 - 2⁵ = 321121211987 is a prime.

It is a super-2 number, since 2×321121212019² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321121211984 and 321121212002.

It is not a weakly prime, because it can be changed into another prime (321121212059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160560606009 + 160560606010.

It is an arithmetic number, because the mean of its divisors is an integer number (160560606010).

Almost surely, 2^321121212019 is an apocalyptic number.

321121212019 is a deficient number, since it is larger than the sum of its proper divisors (1).

321121212019 is an equidigital number, since it uses as much as digits as its factorization.

321121212019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 321121212019 in words is "three hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, nineteen".