1131020312220 has 36 divisors (see below), whose sum is σ = 3430761614280. Its totient is φ = 301605416544.

The previous prime is 1131020312203. The next prime is 1131020312269. The reversal of 1131020312220 is 222130201311.

1131020312220 is a `hidden beast` number, since 1 + 1 + 310 + 20 + 312 + 2 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1131020312193 and 1131020312202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3141722910 + ... + 3141723269.

It is an arithmetic number, because the mean of its divisors is an integer number (95298933730).

Almost surely, 2^{1131020312220} is an apocalyptic number.

1131020312220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131020312220 is an abundant number, since it is smaller than the sum of its proper divisors (2299741302060).

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

1131020312220 is a wasteful number, since it uses less digits than its factorization.

1131020312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283446194 (or 6283446189 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1131020312220 its reverse (222130201311), we get a palindrome (1353150513531).

The spelling of 1131020312220 in words is "one trillion, one hundred thirty-one billion, twenty million, three hundred twelve thousand, two hundred twenty".