21221341413043 has 4 divisors (see below), whose sum is σ = 21222927357328. Its totient is φ = 21219755468760.

The previous prime is 21221341413007. The next prime is 21221341413079. The reversal of 21221341413043 is 34031414312212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21221341413007) and next prime (21221341413079).

It is a cyclic number.

It is not a de Polignac number, because 21221341413043 - 2²⁹ = 21220804542131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21221341412996 and 21221341413014.

It is not an unprimeable number, because it can be changed into a prime (21221341413143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792952071 + ... + 792978832.

It is an arithmetic number, because the mean of its divisors is an integer number (5305731839332).

Almost surely, 2^{21221341413043} is an apocalyptic number.

21221341413043 is a deficient number, since it is larger than the sum of its proper divisors (1585944285).

21221341413043 is a wasteful number, since it uses less digits than its factorization.

21221341413043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585944284.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 21221341413043 its reverse (34031414312212), we get a palindrome (55252755725255).

The spelling of 21221341413043 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred forty-one million, four hundred thirteen thousand, forty-three".