102020101111 has 4 divisors (see below), whose sum is σ = 103030201224. Its totient is φ = 101010001000.

The previous prime is 102020101097. The next prime is 102020101129. The reversal of 102020101111 is 111101020201.

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 102020101111 - 2⁹ = 102020100599 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 (102020101151) 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, 505049905 + ... + 505050106.

It is an arithmetic number, because the mean of its divisors is an integer number (25757550306).

Almost surely, 2^102020101111 is an apocalyptic number.

102020101111 is a deficient number, since it is larger than the sum of its proper divisors (1010100113).

102020101111 is a wasteful number, since it uses less digits than its factorization.

102020101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010100112.

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

Adding to 102020101111 its reverse (111101020201), we get a palindrome (213121121312).

The spelling of 102020101111 in words is "one hundred two billion, twenty million, one hundred one thousand, one hundred eleven".