10102020111 has 16 divisors (see below), whose sum is σ = 15753638400. Its totient is φ = 6380222904.

The previous prime is 10102020091. The next prime is 10102020119. The reversal of 10102020111 is 11102020101.

It is a happy number.

It is not a de Polignac number, because 10102020111 - 2⁵ = 10102020079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10102020093 and 10102020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102020119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9845511 + ... + 9846536.

It is an arithmetic number, because the mean of its divisors is an integer number (984602400).

Almost surely, 2^10102020111 is an apocalyptic number.

10102020111 is a deficient number, since it is larger than the sum of its proper divisors (5651618289).

10102020111 is a wasteful number, since it uses less digits than its factorization.

10102020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19692075 (or 19692069 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10102020111 its reverse (11102020101), we get a palindrome (21204040212).

The spelling of 10102020111 in words is "ten billion, one hundred two million, twenty thousand, one hundred eleven".