21231241142 has 8 divisors (see below), whose sum is σ = 32587486536. Its totient is φ = 10368745632.

The previous prime is 21231241103. The next prime is 21231241159. The reversal of 21231241142 is 24114213212.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123437363 + ... + 123437534.

It is an arithmetic number, because the mean of its divisors is an integer number (4073435817).

Almost surely, 2^21231241142 is an apocalyptic number.

21231241142 is a deficient number, since it is larger than the sum of its proper divisors (11356245394).

21231241142 is a wasteful number, since it uses less digits than its factorization.

21231241142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246874942.

The product of its digits is 768, while the sum is 23.

Adding to 21231241142 its reverse (24114213212), we get a palindrome (45345454354).

The spelling of 21231241142 in words is "twenty-one billion, two hundred thirty-one million, two hundred forty-one thousand, one hundred forty-two".