1212120113 has 2 divisors, whose sum is σ = 1212120114. Its totient is φ = 1212120112.

The previous prime is 1212120109. The next prime is 1212120137. The reversal of 1212120113 is 3110212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1102771264 + 109348849 = 33208^2 + 10457^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212120113 - 2² = 1212120109 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212120193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606060056 + 606060057.

It is an arithmetic number, because the mean of its divisors is an integer number (606060057).

Almost surely, 2^1212120113 is an apocalyptic number.

It is an amenable number.

1212120113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212120113 is an equidigital number, since it uses as much as digits as its factorization.

1212120113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1212120113 is about 34815.5154062093. The cubic root of 1212120113 is about 1066.2242419861.

Adding to 1212120113 its reverse (3110212121), we get a palindrome (4322332234).

The spelling of 1212120113 in words is "one billion, two hundred twelve million, one hundred twenty thousand, one hundred thirteen".