21101031352 has 16 divisors (see below), whose sum is σ = 40106413440. Its totient is φ = 10405987776.

The previous prime is 21101031323. The next prime is 21101031379. The reversal of 21101031352 is 25313010112.

It is a congruent number.

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, 18065368 + ... + 18066535.

It is an arithmetic number, because the mean of its divisors is an integer number (2506650840).

Almost surely, 2^21101031352 is an apocalyptic number.

It is an amenable number.

21101031352 is a deficient number, since it is larger than the sum of its proper divisors (19005382088).

21101031352 is a wasteful number, since it uses less digits than its factorization.

21101031352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36131982 (or 36131978 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 21101031352 its reverse (25313010112), we get a palindrome (46414041464).

The spelling of 21101031352 in words is "twenty-one billion, one hundred one million, thirty-one thousand, three hundred fifty-two".