201221110012 has 24 divisors (see below), whose sum is σ = 379236632096. Its totient is φ = 92868285888.

The previous prime is 201221109967. The next prime is 201221110021. The reversal of 201221110012 is 210011122102.

It is a super-2 number, since 2×201221110012² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 201221109974 and 201221110001.

It is a congruent number.

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, 2949673 + ... + 3017119.

Almost surely, 2^201221110012 is an apocalyptic number.

It is an amenable number.

201221110012 is a deficient number, since it is larger than the sum of its proper divisors (178015522084).

201221110012 is a wasteful number, since it uses less digits than its factorization.

201221110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124837 (or 124835 counting only the distinct ones).

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

Adding to 201221110012 its reverse (210011122102), we get a palindrome (411232232114).

The spelling of 201221110012 in words is "two hundred one billion, two hundred twenty-one million, one hundred ten thousand, twelve".