21112123010 has 32 divisors (see below), whose sum is σ = 41634508032. Its totient is φ = 7644177280.

The previous prime is 21112123007. The next prime is 21112123051. The reversal of 21112123010 is 1032121112.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386234 + ... + 437493.

It is an arithmetic number, because the mean of its divisors is an integer number (1301078376).

Almost surely, 2^21112123010 is an apocalyptic number.

21112123010 is a deficient number, since it is larger than the sum of its proper divisors (20522385022).

21112123010 is a wasteful number, since it uses less digits than its factorization.

21112123010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823978.

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

Adding to 21112123010 its reverse (1032121112), we get a palindrome (22144244122).

The spelling of 21112123010 in words is "twenty-one billion, one hundred twelve million, one hundred twenty-three thousand, ten".