21310111343401 has 16 divisors (see below), whose sum is σ = 21731700698496. Its totient is φ = 20889248663296.

The previous prime is 21310111343371. The next prime is 21310111343407. The reversal of 21310111343401 is 10434311101312.

It is not a de Polignac number, because 21310111343401 - 2²⁵ = 21310077788969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310111343407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866498961 + ... + 866523553.

It is an arithmetic number, because the mean of its divisors is an integer number (1358231293656).

Almost surely, 2^{21310111343401} is an apocalyptic number.

It is an amenable number.

21310111343401 is a deficient number, since it is larger than the sum of its proper divisors (421589355095).

21310111343401 is a wasteful number, since it uses less digits than its factorization.

21310111343401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38672.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 21310111343401 its reverse (10434311101312), we get a palindrome (31744422444713).

The spelling of 21310111343401 in words is "twenty-one trillion, three hundred ten billion, one hundred eleven million, three hundred forty-three thousand, four hundred one".