1102020111 has 12 divisors (see below), whose sum is σ = 1592100120. Its totient is φ = 734544720.

The previous prime is 1102020109. The next prime is 1102020131. The reversal of 1102020111 is 1110202011.

It is a happy number.

It is not a de Polignac number, because 1102020111 - 2¹ = 1102020109 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 = 1102020093 and 1102020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102020131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75085 + ... + 88553.

It is an arithmetic number, because the mean of its divisors is an integer number (132675010).

Almost surely, 2^1102020111 is an apocalyptic number.

1102020111 is a deficient number, since it is larger than the sum of its proper divisors (490080009).

1102020111 is a wasteful number, since it uses less digits than its factorization.

1102020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22566 (or 22563 counting only the distinct ones).

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

The square root of 1102020111 is about 33196.6882534990. The cubic root of 1102020111 is about 1032.9116442982.

Adding to 1102020111 its reverse (1110202011), we get a palindrome (2212222122).

The spelling of 1102020111 in words is "one billion, one hundred two million, twenty thousand, one hundred eleven".