20102111259 has 4 divisors (see below), whose sum is σ = 26802815016. Its totient is φ = 13401407504.

The previous prime is 20102111257. The next prime is 20102111311. The reversal of 20102111259 is 95211120102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20102111259 - 2¹ = 20102111257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20102111257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3350351874 + ... + 3350351879.

It is an arithmetic number, because the mean of its divisors is an integer number (6700703754).

Almost surely, 2^20102111259 is an apocalyptic number.

20102111259 is a deficient number, since it is larger than the sum of its proper divisors (6700703757).

20102111259 is an equidigital number, since it uses as much as digits as its factorization.

20102111259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700703756.

The product of its (nonzero) digits is 360, while the sum is 24.

The spelling of 20102111259 in words is "twenty billion, one hundred two million, one hundred eleven thousand, two hundred fifty-nine".