20010102211111 has 16 divisors (see below), whose sum is σ = 21182210899200. Its totient is φ = 18849900806208.

The previous prime is 20010102211093. The next prime is 20010102211117. The reversal of 20010102211111 is 11111220101002.

It is a happy number.

It is not a de Polignac number, because 20010102211111 - 2⁵ = 20010102211079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010102211091 and 20010102211100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010102211117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59339166 + ... + 59675428.

It is an arithmetic number, because the mean of its divisors is an integer number (1323888181200).

Almost surely, 2^{20010102211111} is an apocalyptic number.

20010102211111 is a deficient number, since it is larger than the sum of its proper divisors (1172108688089).

20010102211111 is a wasteful number, since it uses less digits than its factorization.

20010102211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353958.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20010102211111 its reverse (11111220101002), we get a palindrome (31121322312113).

The spelling of 20010102211111 in words is "twenty trillion, ten billion, one hundred two million, two hundred eleven thousand, one hundred eleven".