221210220012 has 24 divisors (see below), whose sum is σ = 520221413376. Its totient is φ = 73156135248.

The previous prime is 221210219969. The next prime is 221210220041. The reversal of 221210220012 is 210022012122.

It is a super-2 number, since 2×221210220012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221210219973 and 221210220000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72574008 + ... + 72577055.

It is an arithmetic number, because the mean of its divisors is an integer number (21675892224).

Almost surely, 2^221210220012 is an apocalyptic number.

It is an amenable number.

221210220012 is an abundant number, since it is smaller than the sum of its proper divisors (299011193364).

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

221210220012 is a wasteful number, since it uses less digits than its factorization.

221210220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145151197 (or 145151195 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221210220012 its reverse (210022012122), we get a palindrome (431232232134).

The spelling of 221210220012 in words is "two hundred twenty-one billion, two hundred ten million, two hundred twenty thousand, twelve".