111211311300020 has 48 divisors (see below), whose sum is σ = 237531333927888. Its totient is φ = 43725962357760.

The previous prime is 111211311299987. The next prime is 111211311300091. The reversal of 111211311300020 is 20003113112111.

It can be written as a sum of positive squares in 8 ways, for example, as 1303848827044 + 109907462472976 = 1141862^2 + 10483676^2 .

It is a super-2 number, since 2×111211311300020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28706609 + ... + 32349528.

It is an arithmetic number, because the mean of its divisors is an integer number (4948569456831).

Almost surely, 2^{111211311300020} is an apocalyptic number.

111211311300020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211311300020 is an abundant number, since it is smaller than the sum of its proper divisors (126320022627868).

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

111211311300020 is a wasteful number, since it uses less digits than its factorization.

111211311300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61057700 (or 61057698 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111211311300020 its reverse (20003113112111), we get a palindrome (131214424412131).

The spelling of 111211311300020 in words is "one hundred eleven trillion, two hundred eleven billion, three hundred eleven million, three hundred thousand, twenty".