221110201212 has 48 divisors (see below), whose sum is σ = 517259705760. Its totient is φ = 73512804352.

The previous prime is 221110201189. The next prime is 221110201237. The reversal of 221110201212 is 212102011122.

It is a super-2 number, since 2×221110201212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221110201191 and 221110201200.

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, 7532548 + ... + 7561844.

It is an arithmetic number, because the mean of its divisors is an integer number (10776243870).

Almost surely, 2^221110201212 is an apocalyptic number.

It is an amenable number.

221110201212 is an abundant number, since it is smaller than the sum of its proper divisors (296149504548).

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

221110201212 is a wasteful number, since it uses less digits than its factorization.

221110201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30910 (or 30908 counting only the distinct ones).

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

Adding to 221110201212 its reverse (212102011122), we get a palindrome (433212212334).

The spelling of 221110201212 in words is "two hundred twenty-one billion, one hundred ten million, two hundred one thousand, two hundred twelve".