201001200121 has 2 divisors, whose sum is σ = 201001200122. Its totient is φ = 201001200120.

The previous prime is 201001200091. The next prime is 201001200133. The reversal of 201001200121 is 121002100102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103644719721 + 97356480400 = 321939^2 + 312020^2 .

It is a cyclic number.

It is not a de Polignac number, because 201001200121 - 2¹⁹ = 201000675833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201001200098 and 201001200107.

It is not a weakly prime, because it can be changed into another prime (201001200151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500600060 + 100500600061.

It is an arithmetic number, because the mean of its divisors is an integer number (100500600061).

Almost surely, 2^201001200121 is an apocalyptic number.

It is an amenable number.

201001200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001200121 is an equidigital number, since it uses as much as digits as its factorization.

201001200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201001200121 its reverse (121002100102), we get a palindrome (322003300223).

It can be divided in two parts, 20100 and 1200121, that added together give a palindrome (1220221).

The spelling of 201001200121 in words is "two hundred one billion, one million, two hundred thousand, one hundred twenty-one".