20010102112811 has 2 divisors, whose sum is σ = 20010102112812. Its totient is φ = 20010102112810.

The previous prime is 20010102112739. The next prime is 20010102112817. The reversal of 20010102112811 is 11821120101002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20010102112811 - 2¹⁸ = 20010101850667 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010102112817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005051056405 + 10005051056406.

It is an arithmetic number, because the mean of its divisors is an integer number (10005051056406).

Almost surely, 2^{20010102112811} is an apocalyptic number.

20010102112811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010102112811 is an equidigital number, since it uses as much as digits as its factorization.

20010102112811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 20010102112811 its reverse (11821120101002), we get a palindrome (31831222213813).

The spelling of 20010102112811 in words is "twenty trillion, ten billion, one hundred two million, one hundred twelve thousand, eight hundred eleven".