23311212019 has 2 divisors, whose sum is σ = 23311212020. Its totient is φ = 23311212018.

The previous prime is 23311211999. The next prime is 23311212131. The reversal of 23311212019 is 91021211332.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23311212019 - 2²¹ = 23309114867 is a prime.

It is a super-2 number, since 2×23311212019² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23311211984 and 23311212002.

It is not a weakly prime, because it can be changed into another prime (23311218019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655606009 + 11655606010.

It is an arithmetic number, because the mean of its divisors is an integer number (11655606010).

Almost surely, 2^23311212019 is an apocalyptic number.

23311212019 is a deficient number, since it is larger than the sum of its proper divisors (1).

23311212019 is an equidigital number, since it uses as much as digits as its factorization.

23311212019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 23311212019 in words is "twenty-three billion, three hundred eleven million, two hundred twelve thousand, nineteen".