221111200201212 has 48 divisors (see below), whose sum is σ = 574545280807680. Its totient is φ = 73537359268464.

The previous prime is 221111200201193. The next prime is 221111200201237. The reversal of 221111200201212 is 212102002111122.

221111200201212 is a `hidden beast` number, since 22 + 111 + 120 + 0 + 201 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 2310703768 + ... + 2310799455.

It is an arithmetic number, because the mean of its divisors is an integer number (11969693350160).

Almost surely, 2^{221111200201212} is an apocalyptic number.

It is an amenable number.

221111200201212 is an abundant number, since it is smaller than the sum of its proper divisors (353434080606468).

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

221111200201212 is a wasteful number, since it uses less digits than its factorization.

221111200201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621503679 (or 4621503671 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221111200201212 its reverse (212102002111122), we get a palindrome (433213202312334).

The spelling of 221111200201212 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred million, two hundred one thousand, two hundred twelve".