21112055242 has 8 divisors (see below), whose sum is σ = 31769910432. Its totient is φ = 10522085100.

The previous prime is 21112055179. The next prime is 21112055267. The reversal of 21112055242 is 24255021112.

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

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, 16970484 + ... + 16971727.

It is an arithmetic number, because the mean of its divisors is an integer number (3971238804).

Almost surely, 2^21112055242 is an apocalyptic number.

21112055242 is a deficient number, since it is larger than the sum of its proper divisors (10657855190).

21112055242 is a wasteful number, since it uses less digits than its factorization.

21112055242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33942524.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 21112055242 its reverse (24255021112), we get a palindrome (45367076354).

The spelling of 21112055242 in words is "twenty-one billion, one hundred twelve million, fifty-five thousand, two hundred forty-two".