201121102011001 has 4 divisors (see below), whose sum is σ = 201121473736612. Its totient is φ = 201120730285392.

The previous prime is 201121102010981. The next prime is 201121102011019. The reversal of 201121102011001 is 100110201121102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74674675385401 + 126446426625600 = 8641451^2 + 11244840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121102011001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201121102011061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185050050 + ... + 186133723.

It is an arithmetic number, because the mean of its divisors is an integer number (50280368434153).

Almost surely, 2^{201121102011001} is an apocalyptic number.

It is an amenable number.

201121102011001 is a deficient number, since it is larger than the sum of its proper divisors (371725611).

201121102011001 is an equidigital number, since it uses as much as digits as its factorization.

201121102011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371725610.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201121102011001 its reverse (100110201121102), we get a palindrome (301231303132103).

The spelling of 201121102011001 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred two million, eleven thousand, one".