1013221111200 has 144 divisors (see below), whose sum is σ = 3303384819840. Its totient is φ = 269753989120.

The previous prime is 1013221111183. The next prime is 1013221111213. The reversal of 1013221111200 is 21111223101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1013221111200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1138681 + ... + 1822919.

It is an arithmetic number, because the mean of its divisors is an integer number (22940172360).

Almost surely, 2^{1013221111200} is an apocalyptic number.

1013221111200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1013221111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1651692409920).

1013221111200 is an abundant number, since it is smaller than the sum of its proper divisors (2290163708640).

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

1013221111200 is a wasteful number, since it uses less digits than its factorization.

1013221111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684879 (or 684866 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1013221111200 its reverse (21111223101), we get a palindrome (1034332334301).

The spelling of 1013221111200 in words is "one trillion, thirteen billion, two hundred twenty-one million, one hundred eleven thousand, two hundred".