201112123210021 has 2 divisors, whose sum is σ = 201112123210022. Its totient is φ = 201112123210020.

The previous prime is 201112123209847. The next prime is 201112123210039. The reversal of 201112123210021 is 120012321211102.

201112123210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198011755872225 + 3100367337796 = 14071665^2 + 1760786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201112123210021 is a prime.

It is a super-2 number, since 2×201112123210021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201112123210091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100556061605010 + 100556061605011.

It is an arithmetic number, because the mean of its divisors is an integer number (100556061605011).

Almost surely, 2^{201112123210021} is an apocalyptic number.

It is an amenable number.

201112123210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201112123210021 is an equidigital number, since it uses as much as digits as its factorization.

201112123210021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 201112123210021 its reverse (120012321211102), we get a palindrome (321124444421123).

The spelling of 201112123210021 in words is "two hundred one trillion, one hundred twelve billion, one hundred twenty-three million, two hundred ten thousand, twenty-one".