1311131021022 has 32 divisors (see below), whose sum is σ = 3014094304800. Its totient is φ = 421973201664.

The previous prime is 1311131020937. The next prime is 1311131021023. The reversal of 1311131021022 is 2201201311131.

1311131021022 is a `hidden beast` number, since 1 + 311 + 1 + 310 + 21 + 0 + 22 = 666.

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 = 1311131020986 and 1311131021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311131021023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418622643 + ... + 418625774.

It is an arithmetic number, because the mean of its divisors is an integer number (94190447025).

Almost surely, 2^{1311131021022} is an apocalyptic number.

1311131021022 is an abundant number, since it is smaller than the sum of its proper divisors (1702963283778).

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

1311131021022 is a wasteful number, since it uses less digits than its factorization.

1311131021022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837248457 (or 837248451 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1311131021022 its reverse (2201201311131), we get a palindrome (3512332332153).

The spelling of 1311131021022 in words is "one trillion, three hundred eleven billion, one hundred thirty-one million, twenty-one thousand, twenty-two".