21120013202 has 4 divisors (see below), whose sum is σ = 31680019806. Its totient is φ = 10560006600.

The previous prime is 21120013127. The next prime is 21120013241. The reversal of 21120013202 is 20231002112.

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 only one way, i.e., 16111478761 + 5008534441 = 126931^2 + 70771^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280003299 + ... + 5280003302.

Almost surely, 2^21120013202 is an apocalyptic number.

21120013202 is a deficient number, since it is larger than the sum of its proper divisors (10560006604).

21120013202 is a wasteful number, since it uses less digits than its factorization.

21120013202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560006603.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21120013202 its reverse (20231002112), we get a palindrome (41351015314).

The spelling of 21120013202 in words is "twenty-one billion, one hundred twenty million, thirteen thousand, two hundred two".