201102020221 has 8 divisors (see below), whose sum is σ = 201868015320. Its totient is φ = 200336313408.

The previous prime is 201102020219. The next prime is 201102020261. The reversal of 201102020221 is 122020201102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39107040025 + 161994980196 = 197755^2 + 402486^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 201102020221 - 2¹ = 201102020219 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 (201102020261) 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 7 ways as a sum of consecutive naturals, for example, 1381335 + ... + 1519963.

It is an arithmetic number, because the mean of its divisors is an integer number (25233501915).

Almost surely, 2^201102020221 is an apocalyptic number.

It is an amenable number.

201102020221 is a deficient number, since it is larger than the sum of its proper divisors (765995099).

201102020221 is a wasteful number, since it uses less digits than its factorization.

201102020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144143.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201102020221 its reverse (122020201102), we get a palindrome (323122221323).

The spelling of 201102020221 in words is "two hundred one billion, one hundred two million, twenty thousand, two hundred twenty-one".