201102200221 has 4 divisors (see below), whose sum is σ = 216571600252. Its totient is φ = 185632800192.

The previous prime is 201102200197. The next prime is 201102200227. The reversal of 201102200221 is 122002201102.

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 61039137721 + 140063062500 = 247061^2 + 374250^2 .

It is a cyclic number.

It is not a de Polignac number, because 201102200221 - 2³³ = 192512265629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 15469400017 = 201102200221 / (2 + 0 + 1 + 1 + 0 + 2 + 2 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201102200227) 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, 7734699996 + ... + 7734700021.

It is an arithmetic number, because the mean of its divisors is an integer number (54142900063).

Almost surely, 2^201102200221 is an apocalyptic number.

It is an amenable number.

201102200221 is a deficient number, since it is larger than the sum of its proper divisors (15469400031).

201102200221 is a wasteful number, since it uses less digits than its factorization.

201102200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15469400030.

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

Adding to 201102200221 its reverse (122002201102), we get a palindrome (323104401323).

The spelling of 201102200221 in words is "two hundred one billion, one hundred two million, two hundred thousand, two hundred twenty-one".