1220012111200 has 72 divisors (see below), whose sum is σ = 2978528158872. Its totient is φ = 487976401920.

The previous prime is 1220012111189. The next prime is 1220012111203. The reversal of 1220012111200 is 21112100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220012111203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18548772 + ... + 18614428.

It is an arithmetic number, because the mean of its divisors is an integer number (41368446651).

Almost surely, 2^{1220012111200} is an apocalyptic number.

1220012111200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220012111200 is an abundant number, since it is smaller than the sum of its proper divisors (1758516047672).

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

1220012111200 is a wasteful number, since it uses less digits than its factorization.

1220012111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88904 (or 88891 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220012111200 its reverse (21112100221), we get a palindrome (1241124211421).

The spelling of 1220012111200 in words is "one trillion, two hundred twenty billion, twelve million, one hundred eleven thousand, two hundred".