21002214043 has 8 divisors (see below), whose sum is σ = 22449875616. Its totient is φ = 19599096000.

The previous prime is 21002214029. The next prime is 21002214049. The reversal of 21002214043 is 34041220012.

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 21002214043 - 2¹⁷ = 21002082971 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 21002214043.

It is not an unprimeable number, because it can be changed into a prime (21002214049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11134908 + ... + 11136793.

It is an arithmetic number, because the mean of its divisors is an integer number (2806234452).

Almost surely, 2^21002214043 is an apocalyptic number.

21002214043 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21002214043 is a deficient number, since it is larger than the sum of its proper divisors (1447661573).

21002214043 is a wasteful number, since it uses less digits than its factorization.

21002214043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22271765.

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

Adding to 21002214043 its reverse (34041220012), we get a palindrome (55043434055).

The spelling of 21002214043 in words is "twenty-one billion, two million, two hundred fourteen thousand, forty-three".