1220111121200 has 90 divisors (see below), whose sum is σ = 3093717166884. Its totient is φ = 462357843840.

The previous prime is 1220111121193. The next prime is 1220111121217. The reversal of 1220111121200 is 21211110221.

It is a super-2 number, since 2×1220111121200² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4080362 + ... + 4369161.

Almost surely, 2^{1220111121200} is an apocalyptic number.

1220111121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220111121200 is an abundant number, since it is smaller than the sum of its proper divisors (1873606045684).

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

1220111121200 is a wasteful number, since it uses less digits than its factorization.

1220111121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8449579 (or 8449549 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220111121200 its reverse (21211110221), we get a palindrome (1241322231421).

The spelling of 1220111121200 in words is "one trillion, two hundred twenty billion, one hundred eleven million, one hundred twenty-one thousand, two hundred".