20101120202143 has 2 divisors, whose sum is σ = 20101120202144. Its totient is φ = 20101120202142.

The previous prime is 20101120202113. The next prime is 20101120202147. The reversal of 20101120202143 is 34120202110102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20101120202143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20101120202143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101120202147) 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 as a sum of consecutive naturals, namely, 10050560101071 + 10050560101072.

It is an arithmetic number, because the mean of its divisors is an integer number (10050560101072).

Almost surely, 2^{20101120202143} is an apocalyptic number.

20101120202143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101120202143 is an equidigital number, since it uses as much as digits as its factorization.

20101120202143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20101120202143 its reverse (34120202110102), we get a palindrome (54221322312245).

The spelling of 20101120202143 in words is "twenty trillion, one hundred one billion, one hundred twenty million, two hundred two thousand, one hundred forty-three".