21011012223110 has 96 divisors (see below), whose sum is σ = 48659268974400. Its totient is φ = 6360524146944.

The previous prime is 21011012223067. The next prime is 21011012223121. The reversal of 21011012223110 is 1132221011012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21341885 + ... + 22304664.

It is an arithmetic number, because the mean of its divisors is an integer number (506867385150).

Almost surely, 2^{21011012223110} is an apocalyptic number.

21011012223110 is an abundant number, since it is smaller than the sum of its proper divisors (27648256751290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011012223110 is a wasteful number, since it uses less digits than its factorization.

21011012223110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43646622 (or 43646599 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21011012223110 its reverse (1132221011012), we get a palindrome (22143233234122).

The spelling of 21011012223110 in words is "twenty-one trillion, eleven billion, twelve million, two hundred twenty-three thousand, one hundred ten".