1201111110 has 24 divisors (see below), whose sum is σ = 3122889120. Its totient is φ = 320296272.

The previous prime is 1201111091. The next prime is 1201111117. The reversal of 1201111110 is 111111021.

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 = 1201111092 and 1201111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201111117) 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 11 ways as a sum of consecutive naturals, for example, 6672750 + ... + 6672929.

It is an arithmetic number, because the mean of its divisors is an integer number (130120380).

Almost surely, 2^1201111110 is an apocalyptic number.

1201111110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201111110 is an abundant number, since it is smaller than the sum of its proper divisors (1921778010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201111110 is a wasteful number, since it uses less digits than its factorization.

1201111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13345692 (or 13345689 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

The square root of 1201111110 is about 34657.0499321567. The cubic root of 1201111110 is about 1062.9864487180.

Adding to 1201111110 its reverse (111111021), we get a palindrome (1312222131).

The spelling of 1201111110 in words is "one billion, two hundred one million, one hundred eleven thousand, one hundred ten".