21213433014413 has 4 divisors (see below), whose sum is σ = 21266334344028. Its totient is φ = 21160531684800.

The previous prime is 21213433014407. The next prime is 21213433014419. The reversal of 21213433014413 is 31441033431212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21213433014407) and next prime (21213433014419).

It can be written as a sum of positive squares in 2 ways, for example, as 13139776763689 + 8073656250724 = 3624883^2 + 2841418^2 .

It is a cyclic number.

It is not a de Polignac number, because 21213433014413 - 2⁸ = 21213433014157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21213433014413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213433014419) 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, 26450664206 + ... + 26450665007.

It is an arithmetic number, because the mean of its divisors is an integer number (5316583586007).

Almost surely, 2^{21213433014413} is an apocalyptic number.

It is an amenable number.

21213433014413 is a deficient number, since it is larger than the sum of its proper divisors (52901329615).

21213433014413 is an equidigital number, since it uses as much as digits as its factorization.

21213433014413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52901329614.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 21213433014413 its reverse (31441033431212), we get a palindrome (52654466445625).

The spelling of 21213433014413 in words is "twenty-one trillion, two hundred thirteen billion, four hundred thirty-three million, fourteen thousand, four hundred thirteen".