1311211022120 has 32 divisors (see below), whose sum is σ = 2961442408320. Its totient is φ = 522490167360.

The previous prime is 1311211022087. The next prime is 1311211022129. The reversal of 1311211022120 is 212201121131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1311211022129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62309396 + ... + 62330435.

It is an arithmetic number, because the mean of its divisors is an integer number (92545075260).

Almost surely, 2^{1311211022120} is an apocalyptic number.

1311211022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311211022120 is an abundant number, since it is smaller than the sum of its proper divisors (1650231386200).

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

1311211022120 is a wasteful number, since it uses less digits than its factorization.

1311211022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124640105 (or 124640101 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1311211022120 its reverse (212201121131), we get a palindrome (1523412143251).

The spelling of 1311211022120 in words is "one trillion, three hundred eleven billion, two hundred eleven million, twenty-two thousand, one hundred twenty".