1111312121020 has 48 divisors (see below), whose sum is σ = 2354633064000. Its totient is φ = 440548914176.

The previous prime is 1111312121011. The next prime is 1111312121089. The reversal of 1111312121020 is 201212131111.

It is a happy number.

It is a super-2 number, since 2×1111312121020² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1111312120985 and 1111312121003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35577129 + ... + 35608351.

It is an arithmetic number, because the mean of its divisors is an integer number (49054855500).

Almost surely, 2^{1111312121020} is an apocalyptic number.

1111312121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111312121020 is an abundant number, since it is smaller than the sum of its proper divisors (1243320942980).

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

1111312121020 is a wasteful number, since it uses less digits than its factorization.

1111312121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47094 (or 47092 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1111312121020 its reverse (201212131111), we get a palindrome (1312524252131).

The spelling of 1111312121020 in words is "one trillion, one hundred eleven billion, three hundred twelve million, one hundred twenty-one thousand, twenty".