1102201985 has 24 divisors (see below), whose sum is σ = 1392603576. Its totient is φ = 837204480.

The previous prime is 1102201949. The next prime is 1102201999. The reversal of 1102201985 is 5891022011.

It can be written as a sum of positive squares in 12 ways, for example, as 482988529 + 619213456 = 21977^2 + 24884^2 .

It is not a de Polignac number, because 1102201985 - 2⁶ = 1102201921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254357 + ... + 258653.

It is an arithmetic number, because the mean of its divisors is an integer number (58025149).

Almost surely, 2^1102201985 is an apocalyptic number.

It is an amenable number.

1102201985 is a deficient number, since it is larger than the sum of its proper divisors (290401591).

1102201985 is an equidigital number, since it uses as much as digits as its factorization.

1102201985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421 (or 4392 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 1102201985 is about 33199.4274800033. The cubic root of 1102201985 is about 1032.9684640232.

Adding to 1102201985 its reverse (5891022011), we get a palindrome (6993223996).

The spelling of 1102201985 in words is "one billion, one hundred two million, two hundred one thousand, nine hundred eighty-five".