21101430342 has 16 divisors (see below), whose sum is σ = 42204441600. Its totient is φ = 7033546632.

The previous prime is 21101430257. The next prime is 21101430367. The reversal of 21101430342 is 24303410112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175923 + ... + 270465.

It is an arithmetic number, because the mean of its divisors is an integer number (2637777600).

Almost surely, 2^21101430342 is an apocalyptic number.

21101430342 is an abundant number, since it is smaller than the sum of its proper divisors (21103011258).

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

21101430342 is a wasteful number, since it uses less digits than its factorization.

21101430342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131747.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21101430342 its reverse (24303410112), we get a palindrome (45404840454).

The spelling of 21101430342 in words is "twenty-one billion, one hundred one million, four hundred thirty thousand, three hundred forty-two".