1203211116 has 18 divisors (see below), whose sum is σ = 3041450412. Its totient is φ = 401070360.

The previous prime is 1203211111. The next prime is 1203211123. The reversal of 1203211116 is 6111123021.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1203211111) 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, 16711230 + ... + 16711301.

Almost surely, 2^1203211116 is an apocalyptic number.

It is an amenable number.

1203211116 is an abundant number, since it is smaller than the sum of its proper divisors (1838239296).

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

1203211116 is a wasteful number, since it uses less digits than its factorization.

1203211116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33422541 (or 33422536 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1203211116 is about 34687.3336536552. Note that the first 3 decimals coincide. The cubic root of 1203211116 is about 1063.6055916107.

Adding to 1203211116 its reverse (6111123021), we get a palindrome (7314334137).

The spelling of 1203211116 in words is "one billion, two hundred three million, two hundred eleven thousand, one hundred sixteen".