21110953611 has 12 divisors (see below), whose sum is σ = 30939469736. Its totient is φ = 12794517120.

The previous prime is 21110953571. The next prime is 21110953631. The reversal of 21110953611 is 11635901112.

It is not a de Polignac number, because 21110953611 - 2¹⁰ = 21110952587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110953631) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 29078086 + ... + 29078811.

Almost surely, 2^21110953611 is an apocalyptic number.

21110953611 is a deficient number, since it is larger than the sum of its proper divisors (9828516125).

21110953611 is a wasteful number, since it uses less digits than its factorization.

21110953611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58156922 (or 58156911 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 30.

The spelling of 21110953611 in words is "twenty-one billion, one hundred ten million, nine hundred fifty-three thousand, six hundred eleven".