21110102311 has 16 divisors (see below), whose sum is σ = 22060195200. Its totient is φ = 20185447680.

The previous prime is 21110102303. The next prime is 21110102339. The reversal of 21110102311 is 11320101112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21110102311 - 2³ = 21110102303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110102291 and 21110102300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110102341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402475 + ... + 451891.

It is an arithmetic number, because the mean of its divisors is an integer number (1378762200).

Almost surely, 2^21110102311 is an apocalyptic number.

21110102311 is a deficient number, since it is larger than the sum of its proper divisors (950092889).

21110102311 is a wasteful number, since it uses less digits than its factorization.

21110102311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49674.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21110102311 its reverse (11320101112), we get a palindrome (32430203423).

The spelling of 21110102311 in words is "twenty-one billion, one hundred ten million, one hundred two thousand, three hundred eleven".