21231401342 has 8 divisors (see below), whose sum is σ = 31851678432. Its totient is φ = 10614175200.

The previous prime is 21231401333. The next prime is 21231401377. The reversal of 21231401342 is 24310413212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 745259 + ... + 773222.

It is an arithmetic number, because the mean of its divisors is an integer number (3981459804).

Almost surely, 2^21231401342 is an apocalyptic number.

21231401342 is a deficient number, since it is larger than the sum of its proper divisors (10620277090).

21231401342 is a wasteful number, since it uses less digits than its factorization.

21231401342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525474.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21231401342 its reverse (24310413212), we get a palindrome (45541814554).

The spelling of 21231401342 in words is "twenty-one billion, two hundred thirty-one million, four hundred one thousand, three hundred forty-two".