1131333111220 has 192 divisors, whose sum is σ = 2747502084096. Its totient is φ = 388062005760.

The previous prime is 1131333111211. The next prime is 1131333111239. The reversal of 1131333111220 is 221113331311.

It is a junction number, because it is equal to n+sod(n) for n = 1131333111191 and 1131333111200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36803497 + ... + 36834223.

It is an arithmetic number, because the mean of its divisors is an integer number (14309906688).

Almost surely, 2^{1131333111220} is an apocalyptic number.

1131333111220 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 1131333111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1373751042048).

1131333111220 is an abundant number, since it is smaller than the sum of its proper divisors (1616168972876).

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

1131333111220 is a wasteful number, since it uses less digits than its factorization.

1131333111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30950 (or 30948 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1131333111220 its reverse (221113331311), we get a palindrome (1352446442531).

The spelling of 1131333111220 in words is "one trillion, one hundred thirty-one billion, three hundred thirty-three million, one hundred eleven thousand, two hundred twenty".