20121210859 has 2 divisors, whose sum is σ = 20121210860. Its totient is φ = 20121210858.

The previous prime is 20121210847. The next prime is 20121211001. The reversal of 20121210859 is 95801212102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121210859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20121210859.

It is not a weakly prime, because it can be changed into another prime (20121210059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060605429 + 10060605430.

It is an arithmetic number, because the mean of its divisors is an integer number (10060605430).

Almost surely, 2^20121210859 is an apocalyptic number.

20121210859 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121210859 is an equidigital number, since it uses as much as digits as its factorization.

20121210859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 31.

The spelling of 20121210859 in words is "twenty billion, one hundred twenty-one million, two hundred ten thousand, eight hundred fifty-nine".