21300042436401 has 4 divisors (see below), whose sum is σ = 28400056581872. Its totient is φ = 14200028290932.

The previous prime is 21300042436391. The next prime is 21300042436411. The reversal of 21300042436401 is 10463424000312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21300042436391) and next prime (21300042436411).

It is not a de Polignac number, because 21300042436401 - 2⁵ = 21300042436369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300042436411) 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, 3550007072731 + ... + 3550007072736.

It is an arithmetic number, because the mean of its divisors is an integer number (7100014145468).

Almost surely, 2^{21300042436401} is an apocalyptic number.

It is an amenable number.

21300042436401 is a deficient number, since it is larger than the sum of its proper divisors (7100014145471).

21300042436401 is an equidigital number, since it uses as much as digits as its factorization.

21300042436401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100014145470.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21300042436401 its reverse (10463424000312), we get a palindrome (31763466436713).

The spelling of 21300042436401 in words is "twenty-one trillion, three hundred billion, forty-two million, four hundred thirty-six thousand, four hundred one".