21312244202043 has 8 divisors (see below), whose sum is σ = 29332981267456. Its totient is φ = 13749834969000.

The previous prime is 21312244202003. The next prime is 21312244202083. The reversal of 21312244202043 is 34020244221312.

It is an interprime number because it is at equal distance from previous prime (21312244202003) and next prime (21312244202083).

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

It is not a de Polignac number, because 21312244202043 - 2²² = 21312240007739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21312244202043.

It is not an unprimeable number, because it can be changed into a prime (21312244202003) 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, 114581957983 + ... + 114581958168.

It is an arithmetic number, because the mean of its divisors is an integer number (3666622658432).

Almost surely, 2^{21312244202043} is an apocalyptic number.

21312244202043 is a deficient number, since it is larger than the sum of its proper divisors (8020737065413).

21312244202043 is a wasteful number, since it uses less digits than its factorization.

21312244202043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229163916185.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21312244202043 its reverse (34020244221312), we get a palindrome (55332488423355).

The spelling of 21312244202043 in words is "twenty-one trillion, three hundred twelve billion, two hundred forty-four million, two hundred two thousand, forty-three".