21201120202 has 8 divisors (see below), whose sum is σ = 31803120612. Its totient is φ = 10600080000.

The previous prime is 21201120197. The next prime is 21201120203. The reversal of 21201120202 is 20202110212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19726483401 + 1474636801 = 140451^2 + 38401^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21201120203) 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, 182049 + ... + 274852.

Almost surely, 2^21201120202 is an apocalyptic number.

21201120202 is a deficient number, since it is larger than the sum of its proper divisors (10602000410).

21201120202 is a wasteful number, since it uses less digits than its factorization.

21201120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480104.

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

Adding to 21201120202 its reverse (20202110212), we get a palindrome (41403230414).

The spelling of 21201120202 in words is "twenty-one billion, two hundred one million, one hundred twenty thousand, two hundred two".