21241347202 has 4 divisors (see below), whose sum is σ = 31862020806. Its totient is φ = 10620673600.

The previous prime is 21241347181. The next prime is 21241347203. The reversal of 21241347202 is 20274314212.

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., 17742506401 + 3498840801 = 133201^2 + 59151^2 .

It is not an unprimeable number, because it can be changed into a prime (21241347203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310336799 + ... + 5310336802.

Almost surely, 2^21241347202 is an apocalyptic number.

21241347202 is a deficient number, since it is larger than the sum of its proper divisors (10620673604).

21241347202 is a wasteful number, since it uses less digits than its factorization.

21241347202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10620673603.

The product of its (nonzero) digits is 5376, while the sum is 28.

The spelling of 21241347202 in words is "twenty-one billion, two hundred forty-one million, three hundred forty-seven thousand, two hundred two".