1122212121200 has 60 divisors (see below), whose sum is σ = 2701743714240. Its totient is φ = 447947642880.

The previous prime is 1122212121181. The next prime is 1122212121229. The reversal of 1122212121200 is 21212122211.

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, 2736929 + ... + 3120128.

It is an arithmetic number, because the mean of its divisors is an integer number (45029061904).

Almost surely, 2^{1122212121200} is an apocalyptic number.

1122212121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122212121200 is an abundant number, since it is smaller than the sum of its proper divisors (1579531593040).

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

1122212121200 is a wasteful number, since it uses less digits than its factorization.

1122212121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5857554 (or 5857543 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1122212121200 its reverse (21212122211), we get a palindrome (1143424243411).

The spelling of 1122212121200 in words is "one trillion, one hundred twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred".