102210111 has 6 divisors (see below), whose sum is σ = 147636840. Its totient is φ = 68140068.

The previous prime is 102210107. The next prime is 102210127. The reversal of 102210111 is 111012201.

It is a happy number.

It is not a de Polignac number, because 102210111 - 2² = 102210107 is a prime.

It is a super-3 number, since 3×102210111³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 11356679 = 102210111 / (1 + 0 + 2 + 2 + 1 + 0 + 1 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 102210093 and 102210102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102210151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5678331 + ... + 5678348.

It is an arithmetic number, because the mean of its divisors is an integer number (24606140).

Almost surely, 2^102210111 is an apocalyptic number.

102210111 is a deficient number, since it is larger than the sum of its proper divisors (45426729).

102210111 is a wasteful number, since it uses less digits than its factorization.

102210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11356685 (or 11356682 counting only the distinct ones).

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

The square root of 102210111 is about 10109.9016315689. The cubic root of 102210111 is about 467.5534722979.

Adding to 102210111 its reverse (111012201), we get a palindrome (213222312).

The spelling of 102210111 in words is "one hundred two million, two hundred ten thousand, one hundred eleven".