21120110311 has 8 divisors (see below), whose sum is σ = 21807586944. Its totient is φ = 20433020160.

The previous prime is 21120110273. The next prime is 21120110317. The reversal of 21120110311 is 11301102112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21120110311 - 2⁷ = 21120110183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21120110291 and 21120110300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120110317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16575 + ... + 206191.

It is an arithmetic number, because the mean of its divisors is an integer number (2725948368).

Almost surely, 2^21120110311 is an apocalyptic number.

21120110311 is a deficient number, since it is larger than the sum of its proper divisors (687476633).

21120110311 is a wasteful number, since it uses less digits than its factorization.

21120110311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193241.

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

Adding to 21120110311 its reverse (11301102112), we get a palindrome (32421212423).

The spelling of 21120110311 in words is "twenty-one billion, one hundred twenty million, one hundred ten thousand, three hundred eleven".