201211021002101 has 4 divisors (see below), whose sum is σ = 219502932002304. Its totient is φ = 182919110001900.

The previous prime is 201211021002091. The next prime is 201211021002253. The reversal of 201211021002101 is 101200120112102.

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 201211021002101 - 2¹⁸ = 201211020739957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211021002401) 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 in 3 ways as a sum of consecutive naturals, for example, 9145955500085 + ... + 9145955500106.

It is an arithmetic number, because the mean of its divisors is an integer number (54875733000576).

Almost surely, 2^{201211021002101} is an apocalyptic number.

It is an amenable number.

201211021002101 is a deficient number, since it is larger than the sum of its proper divisors (18291911000203).

201211021002101 is a wasteful number, since it uses less digits than its factorization.

201211021002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18291911000202.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201211021002101 its reverse (101200120112102), we get a palindrome (302411141114203).

The spelling of 201211021002101 in words is "two hundred one trillion, two hundred eleven billion, twenty-one million, two thousand, one hundred one".