21510801512 has 16 divisors (see below), whose sum is σ = 42455529600. Its totient is φ = 10189326960.

The previous prime is 21510801491. The next prime is 21510801547.

21510801512 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21510801512² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70759064 + ... + 70759367.

It is an arithmetic number, because the mean of its divisors is an integer number (2653470600).

Almost surely, 2^21510801512 is an apocalyptic number.

It is an amenable number.

21510801512 is a deficient number, since it is larger than the sum of its proper divisors (20944728088).

21510801512 is a wasteful number, since it uses less digits than its factorization.

21510801512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141518456 (or 141518452 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 26.

The spelling of 21510801512 in words is "twenty-one billion, five hundred ten million, eight hundred one thousand, five hundred twelve".