201012021109 has 2 divisors, whose sum is σ = 201012021110. Its totient is φ = 201012021108.

The previous prime is 201012021101. The next prime is 201012021127. The reversal of 201012021109 is 901120210102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117463852900 + 83548168209 = 342730^2 + 289047^2 .

It is a cyclic number.

It is not a de Polignac number, because 201012021109 - 2³ = 201012021101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201012021101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100506010554 + 100506010555.

It is an arithmetic number, because the mean of its divisors is an integer number (100506010555).

Almost surely, 2^201012021109 is an apocalyptic number.

It is an amenable number.

201012021109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201012021109 is an equidigital number, since it uses as much as digits as its factorization.

201012021109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

It can be divided in two parts, 20101 and 2021109, that added together give a triangular number (2041210 = T₂₀₂₀).

The spelling of 201012021109 in words is "two hundred one billion, twelve million, twenty-one thousand, one hundred nine".