21042203201 has 8 divisors (see below), whose sum is σ = 22194808800. Its totient is φ = 19894109760.

The previous prime is 21042203183. The next prime is 21042203233. The reversal of 21042203201 is 10230224012.

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-21042203201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21042203201.

It is not an unprimeable number, because it can be changed into a prime (21042203261) 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, 1118456 + ... + 1137113.

It is an arithmetic number, because the mean of its divisors is an integer number (2774351100).

Almost surely, 2^21042203201 is an apocalyptic number.

It is an amenable number.

21042203201 is a deficient number, since it is larger than the sum of its proper divisors (1152605599).

21042203201 is a wasteful number, since it uses less digits than its factorization.

21042203201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256079.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21042203201 its reverse (10230224012), we get a palindrome (31272427213).

The spelling of 21042203201 in words is "twenty-one billion, forty-two million, two hundred three thousand, two hundred one".