201001220121109 has 2 divisors, whose sum is σ = 201001220121110. Its totient is φ = 201001220121108.

The previous prime is 201001220121103. The next prime is 201001220121157. The reversal of 201001220121109 is 901121022100102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114972070585009 + 86029149536100 = 10722503^2 + 9275190^2 .

It is a cyclic number.

It is not a de Polignac number, because 201001220121109 - 2¹¹ = 201001220119061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201001220121109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201001220121103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500610060554 + 100500610060555.

It is an arithmetic number, because the mean of its divisors is an integer number (100500610060555).

Almost surely, 2^{201001220121109} is an apocalyptic number.

It is an amenable number.

201001220121109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001220121109 is an equidigital number, since it uses as much as digits as its factorization.

201001220121109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 201001220121109 in words is "two hundred one trillion, one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred nine".