1131131231022 has 64 divisors (see below), whose sum is σ = 2470714638336. Its totient is φ = 343153789440.

The previous prime is 1131131231017. The next prime is 1131131231059. The reversal of 1131131231022 is 2201321311311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131131231022.

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, 1347523 + ... + 2019425.

It is an arithmetic number, because the mean of its divisors is an integer number (38604916224).

Almost surely, 2^{1131131231022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131131231022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235357319168).

1131131231022 is an abundant number, since it is smaller than the sum of its proper divisors (1339583407314).

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

1131131231022 is a wasteful number, since it uses less digits than its factorization.

1131131231022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672225.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1131131231022 its reverse (2201321311311), we get a palindrome (3332452542333).

The spelling of 1131131231022 in words is "one trillion, one hundred thirty-one billion, one hundred thirty-one million, two hundred thirty-one thousand, twenty-two".