1311021121110 has 64 divisors (see below), whose sum is σ = 3155068627200. Its totient is φ = 348648676992.

The previous prime is 1311021121087. The next prime is 1311021121127. The reversal of 1311021121110 is 111211201131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1311021121110.

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, 39063357 + ... + 39096903.

It is an arithmetic number, because the mean of its divisors is an integer number (49297947300).

Almost surely, 2^{1311021121110} is an apocalyptic number.

1311021121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311021121110 is an abundant number, since it is smaller than the sum of its proper divisors (1844047506090).

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

1311021121110 is a wasteful number, since it uses less digits than its factorization.

1311021121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37085.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 1311021121110 its reverse (111211201131), we get a palindrome (1422232322241).

The spelling of 1311021121110 in words is "one trillion, three hundred eleven billion, twenty-one million, one hundred twenty-one thousand, one hundred ten".