12021120105851 has 2 divisors, whose sum is σ = 12021120105852. Its totient is φ = 12021120105850.

The previous prime is 12021120105773. The next prime is 12021120105857. The reversal of 12021120105851 is 15850102112021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021120105851 - 2³⁸ = 11746242198907 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021120105857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010560052925 + 6010560052926.

It is an arithmetic number, because the mean of its divisors is an integer number (6010560052926).

Almost surely, 2^{12021120105851} is an apocalyptic number.

12021120105851 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021120105851 is an equidigital number, since it uses as much as digits as its factorization.

12021120105851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 29.

Adding to 12021120105851 its reverse (15850102112021), we get a palindrome (27871222217872).

The spelling of 12021120105851 in words is "twelve trillion, twenty-one billion, one hundred twenty million, one hundred five thousand, eight hundred fifty-one".