21120312110 has 8 divisors (see below), whose sum is σ = 38016561816. Its totient is φ = 8448124840.

The previous prime is 21120312091. The next prime is 21120312137. The reversal of 21120312110 is 1121302112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056015596 + ... + 1056015615.

It is an arithmetic number, because the mean of its divisors is an integer number (4752070227).

Almost surely, 2^21120312110 is an apocalyptic number.

21120312110 is a deficient number, since it is larger than the sum of its proper divisors (16896249706).

21120312110 is a wasteful number, since it uses less digits than its factorization.

21120312110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112031218.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21120312110 its reverse (1121302112), we get a palindrome (22241614222).

The spelling of 21120312110 in words is "twenty-one billion, one hundred twenty million, three hundred twelve thousand, one hundred ten".