201011211001221 has 8 divisors (see below), whose sum is σ = 268015213271904. Its totient is φ = 134007341365680.

The previous prime is 201011211001219. The next prime is 201011211001243. The reversal of 201011211001221 is 122100112110102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201011211001221 - 2¹ = 201011211001219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201011211001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011211001621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29566990 + ... + 35724351.

It is an arithmetic number, because the mean of its divisors is an integer number (33501901658988).

Almost surely, 2^{201011211001221} is an apocalyptic number.

It is an amenable number.

201011211001221 is a deficient number, since it is larger than the sum of its proper divisors (67004002270683).

201011211001221 is a wasteful number, since it uses less digits than its factorization.

201011211001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66317571.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201011211001221 its reverse (122100112110102), we get a palindrome (323111323111323).

The spelling of 201011211001221 in words is "two hundred one trillion, eleven billion, two hundred eleven million, one thousand, two hundred twenty-one".