12011219851 has 2 divisors, whose sum is σ = 12011219852. Its totient is φ = 12011219850.

The previous prime is 12011219849. The next prime is 12011219879. The reversal of 12011219851 is 15891211021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12011219851 - 2¹ = 12011219849 is a prime.

Together with 12011219849, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12011219251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005609925 + 6005609926.

It is an arithmetic number, because the mean of its divisors is an integer number (6005609926).

Almost surely, 2^12011219851 is an apocalyptic number.

12011219851 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011219851 is an equidigital number, since it uses as much as digits as its factorization.

12011219851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 31.

The spelling of 12011219851 in words is "twelve billion, eleven million, two hundred nineteen thousand, eight hundred fifty-one".