21214344440413 has 4 divisors (see below), whose sum is σ = 21573909600480. Its totient is φ = 20854779280348.

The previous prime is 21214344440327. The next prime is 21214344440417. The reversal of 21214344440413 is 31404444341212.

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 a cyclic number.

It is not a de Polignac number, because 21214344440413 - 2¹⁷ = 21214344309341 is a prime.

It is a super-2 number, since 2×21214344440413² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214344440417) 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, 179782579945 + ... + 179782580062.

It is an arithmetic number, because the mean of its divisors is an integer number (5393477400120).

Almost surely, 2^{21214344440413} is an apocalyptic number.

It is an amenable number.

21214344440413 is a deficient number, since it is larger than the sum of its proper divisors (359565160067).

21214344440413 is an equidigital number, since it uses as much as digits as its factorization.

21214344440413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359565160066.

The product of its (nonzero) digits is 147456, while the sum is 37.

Adding to 21214344440413 its reverse (31404444341212), we get a palindrome (52618788781625).

The spelling of 21214344440413 in words is "twenty-one trillion, two hundred fourteen billion, three hundred forty-four million, four hundred forty thousand, four hundred thirteen".