201201102212021 has 4 divisors (see below), whose sum is σ = 201201283641600. Its totient is φ = 201200920782444.

The previous prime is 201201102212009. The next prime is 201201102212027. The reversal of 201201102212021 is 120212201102102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201201102212021 - 2⁴² = 196803055700917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201102212027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89041031 + ... + 91272708.

It is an arithmetic number, because the mean of its divisors is an integer number (50300320910400).

Almost surely, 2^{201201102212021} is an apocalyptic number.

It is an amenable number.

201201102212021 is a deficient number, since it is larger than the sum of its proper divisors (181429579).

201201102212021 is a wasteful number, since it uses less digits than its factorization.

201201102212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181429578.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201201102212021 its reverse (120212201102102), we get a palindrome (321413303314123).

The spelling of 201201102212021 in words is "two hundred one trillion, two hundred one billion, one hundred two million, two hundred twelve thousand, twenty-one".