21050120151 has 6 divisors (see below), whose sum is σ = 30405729120. Its totient is φ = 14033413428.

The previous prime is 21050120129. The next prime is 21050120153. The reversal of 21050120151 is 15102105012.

21050120151 is a `hidden beast` number, since 2 + 10 + 501 + 2 + 0 + 151 = 666.

It is not a de Polignac number, because 21050120151 - 2⁷ = 21050120023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21050120153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1169451111 + ... + 1169451128.

It is an arithmetic number, because the mean of its divisors is an integer number (5067621520).

Almost surely, 2^21050120151 is an apocalyptic number.

21050120151 is a deficient number, since it is larger than the sum of its proper divisors (9355608969).

21050120151 is a wasteful number, since it uses less digits than its factorization.

21050120151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338902245 (or 2338902242 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

Adding to 21050120151 its reverse (15102105012), we get a palindrome (36152225163).

The spelling of 21050120151 in words is "twenty-one billion, fifty million, one hundred twenty thousand, one hundred fifty-one".