21000221341 has 16 divisors (see below), whose sum is σ = 23058318528. Its totient is φ = 18967219200.

The previous prime is 21000221339. The next prime is 21000221353. The reversal of 21000221341 is 14312200012.

It is a cyclic number.

It is not a de Polignac number, because 21000221341 - 2¹ = 21000221339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000221041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1715655 + ... + 1727851.

It is an arithmetic number, because the mean of its divisors is an integer number (1441144908).

Almost surely, 2^21000221341 is an apocalyptic number.

It is an amenable number.

21000221341 is a deficient number, since it is larger than the sum of its proper divisors (2058097187).

21000221341 is a wasteful number, since it uses less digits than its factorization.

21000221341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13212.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21000221341 its reverse (14312200012), we get a palindrome (35312421353).

The spelling of 21000221341 in words is "twenty-one billion, two hundred twenty-one thousand, three hundred forty-one".