1131022311020 has 120 divisors (see below), whose sum is σ = 2772280786800. Its totient is φ = 387577443456.

The previous prime is 1131022311019. The next prime is 1131022311031. The reversal of 1131022311020 is 201132201311.

It is a super-2 number, since 2×1131022311020² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1131022311020.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 114714851 + ... + 114724709.

It is an arithmetic number, because the mean of its divisors is an integer number (23102339890).

Almost surely, 2^{1131022311020} is an apocalyptic number.

1131022311020 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 1131022311020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1386140393400).

1131022311020 is an abundant number, since it is smaller than the sum of its proper divisors (1641258475780).

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

1131022311020 is an equidigital number, since it uses as much as digits as its factorization.

1131022311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12285 (or 12262 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1131022311020 its reverse (201132201311), we get a palindrome (1332154512331).

The spelling of 1131022311020 in words is "one trillion, one hundred thirty-one billion, twenty-two million, three hundred eleven thousand, twenty".