21516022041 has 8 divisors (see below), whose sum is σ = 29298413184. Its totient is φ = 14038822800.

The previous prime is 21516021979. The next prime is 21516022049. The reversal of 21516022041 is 14022061512.

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

It is not a de Polignac number, because 21516022041 - 2¹⁰ = 21516021017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21516022049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76297810 + ... + 76298091.

It is an arithmetic number, because the mean of its divisors is an integer number (3662301648).

Almost surely, 2^21516022041 is an apocalyptic number.

It is an amenable number.

21516022041 is a deficient number, since it is larger than the sum of its proper divisors (7782391143).

21516022041 is a wasteful number, since it uses less digits than its factorization.

21516022041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152595951.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21516022041 its reverse (14022061512), we get a palindrome (35538083553).

The spelling of 21516022041 in words is "twenty-one billion, five hundred sixteen million, twenty-two thousand, forty-one".