1211220002200 has 96 divisors (see below), whose sum is σ = 3033133054560. Its totient is φ = 447157094400.

The previous prime is 1211220002177. The next prime is 1211220002207. The reversal of 1211220002200 is 22000221121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211220002207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21205680 + ... + 21262720.

It is an arithmetic number, because the mean of its divisors is an integer number (31595135985).

Almost surely, 2^{1211220002200} is an apocalyptic number.

1211220002200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211220002200 is an abundant number, since it is smaller than the sum of its proper divisors (1821913052360).

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

1211220002200 is a wasteful number, since it uses less digits than its factorization.

1211220002200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65237 (or 65228 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1211220002200 its reverse (22000221121), we get a palindrome (1233220223321).

The spelling of 1211220002200 in words is "one trillion, two hundred eleven billion, two hundred twenty million, two thousand, two hundred".