21101245342 has 8 divisors (see below), whose sum is σ = 33513742656. Its totient is φ = 9929997792.

The previous prime is 21101245339. The next prime is 21101245351. The reversal of 21101245342 is 24354210112.

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, 310312398 + ... + 310312465.

It is an arithmetic number, because the mean of its divisors is an integer number (4189217832).

Almost surely, 2^21101245342 is an apocalyptic number.

21101245342 is a deficient number, since it is larger than the sum of its proper divisors (12412497314).

21101245342 is a wasteful number, since it uses less digits than its factorization.

21101245342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620624882.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21101245342 its reverse (24354210112), we get a palindrome (45455455454).

The spelling of 21101245342 in words is "twenty-one billion, one hundred one million, two hundred forty-five thousand, three hundred forty-two".