1200111023220 has 96 divisors (see below), whose sum is σ = 3601179364608. Its totient is φ = 297841876992.

The previous prime is 1200111023213. The next prime is 1200111023249. The reversal of 1200111023220 is 223201110021.

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 1200111023220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11700909 + ... + 11803028.

It is an arithmetic number, because the mean of its divisors is an integer number (37512285048).

Almost surely, 2^{1200111023220} is an apocalyptic number.

1200111023220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200111023220 is an abundant number, since it is smaller than the sum of its proper divisors (2401068341388).

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

1200111023220 is a wasteful number, since it uses less digits than its factorization.

1200111023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23504009 (or 23504007 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1200111023220 its reverse (223201110021), we get a palindrome (1423312133241).

The spelling of 1200111023220 in words is "one trillion, two hundred billion, one hundred eleven million, twenty-three thousand, two hundred twenty".