21113650011 has 4 divisors (see below), whose sum is σ = 28151533352. Its totient is φ = 14075766672.

The previous prime is 21113650007. The next prime is 21113650037. The reversal of 21113650011 is 11005631112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21113650011 - 2² = 21113650007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21113650011.

It is not an unprimeable number, because it can be changed into a prime (21113650081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3518941666 + ... + 3518941671.

It is an arithmetic number, because the mean of its divisors is an integer number (7037883338).

Almost surely, 2^21113650011 is an apocalyptic number.

21113650011 is a deficient number, since it is larger than the sum of its proper divisors (7037883341).

21113650011 is an equidigital number, since it uses as much as digits as its factorization.

21113650011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037883340.

The product of its (nonzero) digits is 180, while the sum is 21.

The spelling of 21113650011 in words is "twenty-one billion, one hundred thirteen million, six hundred fifty thousand, eleven".