112121011011221 has 2 divisors, whose sum is σ = 112121011011222. Its totient is φ = 112121011011220.

The previous prime is 112121011011209. The next prime is 112121011011257. The reversal of 112121011011221 is 122110110121211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89823859227025 + 22297151784196 = 9477545^2 + 4721986^2 .

It is a cyclic number.

It is not a de Polignac number, because 112121011011221 - 2⁶ = 112121011011157 is a prime.

It is a super-2 number, since 2×112121011011221² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 112121011011221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112121011010221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56060505505610 + 56060505505611.

It is an arithmetic number, because the mean of its divisors is an integer number (56060505505611).

Almost surely, 2^{112121011011221} is an apocalyptic number.

It is an amenable number.

112121011011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

112121011011221 is an equidigital number, since it uses as much as digits as its factorization.

112121011011221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 112121011011221 its reverse (122110110121211), we get a palindrome (234231121132432).

The spelling of 112121011011221 in words is "one hundred twelve trillion, one hundred twenty-one billion, eleven million, eleven thousand, two hundred twenty-one".