21243034202 has 8 divisors (see below), whose sum is σ = 34315670676. Its totient is φ = 9804477312.

The previous prime is 21243034147. The next prime is 21243034223. The reversal of 21243034202 is 20243034212.

It can be written as a sum of positive squares in 2 ways, for example, as 16913262601 + 4329771601 = 130051^2 + 65801^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408519863 + ... + 408519914.

Almost surely, 2^21243034202 is an apocalyptic number.

21243034202 is a deficient number, since it is larger than the sum of its proper divisors (13072636474).

21243034202 is a wasteful number, since it uses less digits than its factorization.

21243034202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817039792.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21243034202 its reverse (20243034212), we get a palindrome (41486068414).

The spelling of 21243034202 in words is "twenty-one billion, two hundred forty-three million, thirty-four thousand, two hundred two".