10112012221 has 2 divisors, whose sum is σ = 10112012222. Its totient is φ = 10112012220.

The previous prime is 10112012201. The next prime is 10112012243. The reversal of 10112012221 is 12221021101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9415791225 + 696220996 = 97035^2 + 26386^2 .

It is a cyclic number.

It is not a de Polignac number, because 10112012221 - 2⁵ = 10112012189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10112012201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5056006110 + 5056006111.

It is an arithmetic number, because the mean of its divisors is an integer number (5056006111).

Almost surely, 2^10112012221 is an apocalyptic number.

It is an amenable number.

10112012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10112012221 is an equidigital number, since it uses as much as digits as its factorization.

10112012221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10112012221 its reverse (12221021101), we get a palindrome (22333033322).

The spelling of 10112012221 in words is "ten billion, one hundred twelve million, twelve thousand, two hundred twenty-one".