21334311401 has 6 divisors (see below), whose sum is σ = 23101650990. Its totient is φ = 19693210368.

The previous prime is 21334311379. The next prime is 21334311413. The reversal of 21334311401 is 10411343312.

It can be written as a sum of positive squares in 3 ways, for example, as 164352400 + 21169959001 = 12820^2 + 145499^2 .

It is not a de Polignac number, because 21334311401 - 2²² = 21330117097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21334311421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63119096 + ... + 63119433.

It is an arithmetic number, because the mean of its divisors is an integer number (3850275165).

Almost surely, 2^21334311401 is an apocalyptic number.

It is an amenable number.

21334311401 is a deficient number, since it is larger than the sum of its proper divisors (1767339589).

21334311401 is a wasteful number, since it uses less digits than its factorization.

21334311401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126238555 (or 126238542 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21334311401 its reverse (10411343312), we get a palindrome (31745654713).

The spelling of 21334311401 in words is "twenty-one billion, three hundred thirty-four million, three hundred eleven thousand, four hundred one".