1210113331220 has 24 divisors (see below), whose sum is σ = 2541705277608. Its totient is φ = 483956326400.

The previous prime is 1210113331183. The next prime is 1210113331237. The reversal of 1210113331220 is 221333110121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49094151184 + 1161019180036 = 221572^2 + 1077506^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1210113331192 and 1210113331201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5451341 + ... + 5668980.

It is an arithmetic number, because the mean of its divisors is an integer number (105904386567).

Almost surely, 2^{1210113331220} is an apocalyptic number.

1210113331220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210113331220 is an abundant number, since it is smaller than the sum of its proper divisors (1331591946388).

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

1210113331220 is a wasteful number, since it uses less digits than its factorization.

1210113331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11125771 (or 11125769 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1210113331220 its reverse (221333110121), we get a palindrome (1431446441341).

The spelling of 1210113331220 in words is "one trillion, two hundred ten billion, one hundred thirteen million, three hundred thirty-one thousand, two hundred twenty".