21179097112 has 8 divisors (see below), whose sum is σ = 39710807100. Its totient is φ = 10589548552.

The previous prime is 21179097083. The next prime is 21179097119.

21179097112 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21179097119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323693562 + ... + 1323693577.

Almost surely, 2^21179097112 is an apocalyptic number.

It is an amenable number.

21179097112 is a deficient number, since it is larger than the sum of its proper divisors (18531709988).

21179097112 is a wasteful number, since it uses less digits than its factorization.

21179097112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647387145 (or 2647387141 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 40.

The spelling of 21179097112 in words is "twenty-one billion, one hundred seventy-nine million, ninety-seven thousand, one hundred twelve".