21050221342 has 8 divisors (see below), whose sum is σ = 31975020000. Its totient is φ = 10391881344.

The previous prime is 21050221331. The next prime is 21050221363. The reversal of 21050221342 is 24312205012.

It is a happy number.

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

It is a super-2 number, since 2×21050221342² (a number of 21 digits) contains 22 as substring.

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, 66614467 + ... + 66614782.

It is an arithmetic number, because the mean of its divisors is an integer number (3996877500).

Almost surely, 2^21050221342 is an apocalyptic number.

21050221342 is a deficient number, since it is larger than the sum of its proper divisors (10924798658).

21050221342 is a wasteful number, since it uses less digits than its factorization.

21050221342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133229330.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21050221342 its reverse (24312205012), we get a palindrome (45362426354).

The spelling of 21050221342 in words is "twenty-one billion, fifty million, two hundred twenty-one thousand, three hundred forty-two".