21210220110012 has 48 divisors (see below), whose sum is σ = 51646187658240. Its totient is φ = 6762166510528.

The previous prime is 21210220109963. The next prime is 21210220110059. The reversal of 21210220110012 is 21001102201212.

It is a junction number, because it is equal to n+sod(n) for n = 21210220109973 and 21210220110000.

It is a congruent 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, 746653 + ... + 6555755.

It is an arithmetic number, because the mean of its divisors is an integer number (1075962242880).

Almost surely, 2^{21210220110012} is an apocalyptic number.

It is an amenable number.

21210220110012 is an abundant number, since it is smaller than the sum of its proper divisors (30435967548228).

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

21210220110012 is a wasteful number, since it uses less digits than its factorization.

21210220110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822362 (or 5822360 counting only the distinct ones).

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

Adding to 21210220110012 its reverse (21001102201212), we get a palindrome (42211322311224).

The spelling of 21210220110012 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty million, one hundred ten thousand, twelve".