21202120303 has 8 divisors (see below), whose sum is σ = 26094917408. Its totient is φ = 16775303904.

The previous prime is 21202120259. The next prime is 21202120307. The reversal of 21202120303 is 30302120212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202120303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202120307) 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, 116495076 + ... + 116495257.

It is an arithmetic number, because the mean of its divisors is an integer number (3261864676).

Almost surely, 2^21202120303 is an apocalyptic number.

21202120303 is a deficient number, since it is larger than the sum of its proper divisors (4892797105).

21202120303 is a wasteful number, since it uses less digits than its factorization.

21202120303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232990353.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21202120303 its reverse (30302120212), we get a palindrome (51504240515).

Subtracting 21202120303 from its reverse (30302120212), we obtain a palindrome (9099999909).

It can be divided in two parts, 212021 and 20303, that added together give a square (232324 = 482²).

The spelling of 21202120303 in words is "twenty-one billion, two hundred two million, one hundred twenty thousand, three hundred three".