201001012112521 has 2 divisors, whose sum is σ = 201001012112522. Its totient is φ = 201001012112520.

The previous prime is 201001012112513. The next prime is 201001012112569. The reversal of 201001012112521 is 125211210100102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193006029660921 + 7994982451600 = 13892661^2 + 2827540^2 .

It is a cyclic number.

It is not a de Polignac number, because 201001012112521 - 2³ = 201001012112513 is a prime.

It is not a weakly prime, because it can be changed into another prime (201001012112591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500506056260 + 100500506056261.

It is an arithmetic number, because the mean of its divisors is an integer number (100500506056261).

Almost surely, 2^{201001012112521} is an apocalyptic number.

It is an amenable number.

201001012112521 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001012112521 is an equidigital number, since it uses as much as digits as its factorization.

201001012112521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 201001012112521 its reverse (125211210100102), we get a palindrome (326212222212623).

The spelling of 201001012112521 in words is "two hundred one trillion, one billion, twelve million, one hundred twelve thousand, five hundred twenty-one".