1212220120113 has 96 divisors (see below), whose sum is σ = 2017803584160. Its totient is φ = 697101189120.

The previous prime is 1212220120087. The next prime is 1212220120159. The reversal of 1212220120113 is 3110210222121.

1212220120113 is a `hidden beast` number, since 1 + 212 + 220 + 120 + 113 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 248793459264 + 963426660849 = 498792^2 + 981543^2 .

It is not a de Polignac number, because 1212220120113 - 2⁵ = 1212220120081 is a prime.

It is a super-2 number, since 2×1212220120113² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212220120193) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6640881 + ... + 6820977.

It is an arithmetic number, because the mean of its divisors is an integer number (21018787335).

Almost surely, 2^{1212220120113} is an apocalyptic number.

It is an amenable number.

1212220120113 is a deficient number, since it is larger than the sum of its proper divisors (805583464047).

1212220120113 is a wasteful number, since it uses less digits than its factorization.

1212220120113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180227 (or 180224 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1212220120113 its reverse (3110210222121), we get a palindrome (4322430342234).

The spelling of 1212220120113 in words is "one trillion, two hundred twelve billion, two hundred twenty million, one hundred twenty thousand, one hundred thirteen".