21150204523311 has 8 divisors (see below), whose sum is σ = 28200408241024. Its totient is φ = 14100068577240.

The previous prime is 21150204523303. The next prime is 21150204523313. The reversal of 21150204523311 is 11332540205112.

It is a happy number.

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

It is not a de Polignac number, because 21150204523311 - 2³ = 21150204523303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150204523313) 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, 16210195 + ... + 17466276.

It is an arithmetic number, because the mean of its divisors is an integer number (3525051030128).

Almost surely, 2^{21150204523311} is an apocalyptic number.

21150204523311 is a deficient number, since it is larger than the sum of its proper divisors (7050203717713).

21150204523311 is a wasteful number, since it uses less digits than its factorization.

21150204523311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33885821.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 21150204523311 its reverse (11332540205112), we get a palindrome (32482744728423).

The spelling of 21150204523311 in words is "twenty-one trillion, one hundred fifty billion, two hundred four million, five hundred twenty-three thousand, three hundred eleven".