1211222102200 has 48 divisors (see below), whose sum is σ = 3072099701160. Its totient is φ = 440444400000.

The previous prime is 1211222102197. The next prime is 1211222102219. The reversal of 1211222102200 is 22012221121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275275551 + ... + 275279950.

Almost surely, 2^{1211222102200} is an apocalyptic number.

1211222102200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211222102200 is an abundant number, since it is smaller than the sum of its proper divisors (1860877598960).

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

1211222102200 is a wasteful number, since it uses less digits than its factorization.

1211222102200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550555528 (or 550555519 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1211222102200 its reverse (22012221121), we get a palindrome (1233234323321).

The spelling of 1211222102200 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred two thousand, two hundred".