21142102413 has 4 divisors (see below), whose sum is σ = 28189469888. Its totient is φ = 14094734940.

The previous prime is 21142102391. The next prime is 21142102417. The reversal of 21142102413 is 31420124112.

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 not a de Polignac number, because 21142102413 - 2⁶ = 21142102349 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 21142102413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142102417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3523683733 + ... + 3523683738.

It is an arithmetic number, because the mean of its divisors is an integer number (7047367472).

Almost surely, 2^21142102413 is an apocalyptic number.

It is an amenable number.

21142102413 is a deficient number, since it is larger than the sum of its proper divisors (7047367475).

21142102413 is an equidigital number, since it uses as much as digits as its factorization.

21142102413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047367474.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21142102413 its reverse (31420124112), we get a palindrome (52562226525).

The spelling of 21142102413 in words is "twenty-one billion, one hundred forty-two million, one hundred two thousand, four hundred thirteen".