21011001112 has 16 divisors (see below), whose sum is σ = 39397629600. Its totient is φ = 10504966560.

The previous prime is 21011001083. The next prime is 21011001127. The reversal of 21011001112 is 21110011012.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 137089 + ... + 246607.

It is an arithmetic number, because the mean of its divisors is an integer number (2462351850).

Almost surely, 2^21011001112 is an apocalyptic number.

It is an amenable number.

21011001112 is a deficient number, since it is larger than the sum of its proper divisors (18386628488).

21011001112 is a wasteful number, since it uses less digits than its factorization.

21011001112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133506 (or 133502 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21011001112 its reverse (21110011012), we get a palindrome (42121012124).

The spelling of 21011001112 in words is "twenty-one billion, eleven million, one thousand, one hundred twelve".