21502031151112 has 16 divisors (see below), whose sum is σ = 40319479865340. Its totient is φ = 10750169853696.

The previous prime is 21502031151091. The next prime is 21502031151151. The reversal of 21502031151112 is 21115113020512.

It can be written as a sum of positive squares in 2 ways, for example, as 21183061480036 + 318969671076 = 4602506^2 + 564774^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105607173 + ... + 105810580.

Almost surely, 2^{21502031151112} is an apocalyptic number.

It is an amenable number.

21502031151112 is a deficient number, since it is larger than the sum of its proper divisors (18817448714228).

21502031151112 is a wasteful number, since it uses less digits than its factorization.

21502031151112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211430472 (or 211430468 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 25.

Adding to 21502031151112 its reverse (21115113020512), we get a palindrome (42617144171624).

The spelling of 21502031151112 in words is "twenty-one trillion, five hundred two billion, thirty-one million, one hundred fifty-one thousand, one hundred twelve".