21131411429 has 4 divisors (see below), whose sum is σ = 21179112576. Its totient is φ = 21083710284.

The previous prime is 21131411419. The next prime is 21131411471. The reversal of 21131411429 is 92411413112.

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 21131411429 - 2¹² = 21131407333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131411419) 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 3 ways as a sum of consecutive naturals, for example, 23849909 + ... + 23850794.

It is an arithmetic number, because the mean of its divisors is an integer number (5294778144).

Almost surely, 2^21131411429 is an apocalyptic number.

It is an amenable number.

21131411429 is a deficient number, since it is larger than the sum of its proper divisors (47701147).

21131411429 is an equidigital number, since it uses as much as digits as its factorization.

21131411429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47701146.

The product of its digits is 1728, while the sum is 29.

The spelling of 21131411429 in words is "twenty-one billion, one hundred thirty-one million, four hundred eleven thousand, four hundred twenty-nine".