20010102010111 has 4 divisors (see below), whose sum is σ = 20010144686224. Its totient is φ = 20010059334000.

The previous prime is 20010102010061. The next prime is 20010102010277. The reversal of 20010102010111 is 11101020101002.

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 20010102010111 - 2²³ = 20010093621503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010102910111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20626830 + ... + 21575131.

It is an arithmetic number, because the mean of its divisors is an integer number (5002536171556).

Almost surely, 2^{20010102010111} is an apocalyptic number.

20010102010111 is a deficient number, since it is larger than the sum of its proper divisors (42676113).

20010102010111 is an equidigital number, since it uses as much as digits as its factorization.

20010102010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42676112.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20010102010111 its reverse (11101020101002), we get a palindrome (31111122111113).

The spelling of 20010102010111 in words is "twenty trillion, ten billion, one hundred two million, ten thousand, one hundred eleven".