121103131111220 has 12 divisors (see below), whose sum is σ = 254316575333604. Its totient is φ = 48441252444480.

The previous prime is 121103131111219. The next prime is 121103131111247. The reversal of 121103131111220 is 22111131301121.

It can be written as a sum of positive squares in 2 ways, for example, as 21771052074916 + 99332079036304 = 4665946^2 + 9966548^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 6055156555561 = 121103131111220 / (1 + 2 + 1 + 1 + 0 + 3 + 1 + 3 + 1 + 1 + 1 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 121103131111192 and 121103131111201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3027578277761 + ... + 3027578277800.

It is an arithmetic number, because the mean of its divisors is an integer number (21193047944467).

Almost surely, 2^{121103131111220} is an apocalyptic number.

121103131111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121103131111220 is an abundant number, since it is smaller than the sum of its proper divisors (133213444222384).

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

121103131111220 is a wasteful number, since it uses less digits than its factorization.

121103131111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055156555570 (or 6055156555568 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 121103131111220 its reverse (22111131301121), we get a palindrome (143214262412341).

The spelling of 121103131111220 in words is "one hundred twenty-one trillion, one hundred three billion, one hundred thirty-one million, one hundred eleven thousand, two hundred twenty".