20102101202111 has 4 divisors (see below), whose sum is σ = 20592396353424. Its totient is φ = 19611806050800.

The previous prime is 20102101202101. The next prime is 20102101202119. The reversal of 20102101202111 is 11120210120102.

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 20102101202111 - 2¹⁸ = 20102100939967 is a prime.

It is a super-2 number, since 2×20102101202111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102101202119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245147575595 + ... + 245147575676.

It is an arithmetic number, because the mean of its divisors is an integer number (5148099088356).

Almost surely, 2^{20102101202111} is an apocalyptic number.

20102101202111 is a deficient number, since it is larger than the sum of its proper divisors (490295151313).

20102101202111 is an equidigital number, since it uses as much as digits as its factorization.

20102101202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490295151312.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20102101202111 its reverse (11120210120102), we get a palindrome (31222311322213).

The spelling of 20102101202111 in words is "twenty trillion, one hundred two billion, one hundred one million, two hundred two thousand, one hundred eleven".