201112120220021 has 2 divisors, whose sum is σ = 201112120220022. Its totient is φ = 201112120220020.

The previous prime is 201112120219987. The next prime is 201112120220029. The reversal of 201112120220021 is 120022021211102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193731601562500 + 7380518657521 = 13918750^2 + 2716711^2 .

It is a cyclic number.

It is not a de Polignac number, because 201112120220021 - 2⁴² = 196714073708917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201112120220029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100556060110010 + 100556060110011.

It is an arithmetic number, because the mean of its divisors is an integer number (100556060110011).

Almost surely, 2^{201112120220021} is an apocalyptic number.

It is an amenable number.

201112120220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201112120220021 is an equidigital number, since it uses as much as digits as its factorization.

201112120220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201112120220021 its reverse (120022021211102), we get a palindrome (321134141431123).

The spelling of 201112120220021 in words is "two hundred one trillion, one hundred twelve billion, one hundred twenty million, two hundred twenty thousand, twenty-one".