21400102243 has 8 divisors (see below), whose sum is σ = 23305212000. Its totient is φ = 19531985088.

The previous prime is 21400102201. The next prime is 21400102247. The reversal of 21400102243 is 34220100412.

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

It is a cyclic number.

It is not a de Polignac number, because 21400102243 - 2⁹ = 21400101731 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 21400102243.

It is not an unprimeable number, because it can be changed into a prime (21400102247) 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, 9246943 + ... + 9249256.

It is an arithmetic number, because the mean of its divisors is an integer number (2913151500).

Almost surely, 2^21400102243 is an apocalyptic number.

21400102243 is a deficient number, since it is larger than the sum of its proper divisors (1905109757).

21400102243 is a wasteful number, since it uses less digits than its factorization.

21400102243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18496301.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21400102243 its reverse (34220100412), we get a palindrome (55620202655).

The spelling of 21400102243 in words is "twenty-one billion, four hundred million, one hundred two thousand, two hundred forty-three".