221210110012 has 12 divisors (see below), whose sum is σ = 400466578680. Its totient is φ = 106791087536.

The previous prime is 221210110001. The next prime is 221210110019. The reversal of 221210110012 is 210011012122.

It is a super-2 number, since 2×221210110012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221210109974 and 221210110001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210110019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 953491738 + ... + 953491969.

It is an arithmetic number, because the mean of its divisors is an integer number (33372214890).

Almost surely, 2^221210110012 is an apocalyptic number.

It is an amenable number.

221210110012 is a deficient number, since it is larger than the sum of its proper divisors (179256468668).

221210110012 is a wasteful number, since it uses less digits than its factorization.

221210110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906983740 (or 1906983738 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221210110012 its reverse (210011012122), we get a palindrome (431221122134).

The spelling of 221210110012 in words is "two hundred twenty-one billion, two hundred ten million, one hundred ten thousand, twelve".