21112410012 has 48 divisors (see below), whose sum is σ = 50780685312. Its totient is φ = 6821962560.

The previous prime is 21112409959. The next prime is 21112410013. The reversal of 21112410012 is 21001421112.

It is a junction number, because it is equal to n+sod(n) for n = 21112409973 and 21112410000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112410013) 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, 32593 + ... + 208055.

It is an arithmetic number, because the mean of its divisors is an integer number (1057930944).

Almost surely, 2^21112410012 is an apocalyptic number.

It is an amenable number.

21112410012 is an abundant number, since it is smaller than the sum of its proper divisors (29668275300).

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

21112410012 is a wasteful number, since it uses less digits than its factorization.

21112410012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175778 (or 175776 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112410012 its reverse (21001421112), we get a palindrome (42113831124).

The spelling of 21112410012 in words is "twenty-one billion, one hundred twelve million, four hundred ten thousand, twelve".