21101234142 has 8 divisors (see below), whose sum is σ = 42202468296. Its totient is φ = 7033744712.

The previous prime is 21101234137. The next prime is 21101234179. The reversal of 21101234142 is 24143210112.

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

21101234142 is an admirable number.

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, 1758436173 + ... + 1758436184.

It is an arithmetic number, because the mean of its divisors is an integer number (5275308537).

Almost surely, 2^21101234142 is an apocalyptic number.

21101234142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101234142 is a wasteful number, since it uses less digits than its factorization.

21101234142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516872362.

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

Adding to 21101234142 its reverse (24143210112), we get a palindrome (45244444254).

The spelling of 21101234142 in words is "twenty-one billion, one hundred one million, two hundred thirty-four thousand, one hundred forty-two".