221000011212 has 48 divisors (see below), whose sum is σ = 529899608672. Its totient is φ = 71635622400.

The previous prime is 221000011201. The next prime is 221000011259. The reversal of 221000011212 is 212110000122.

221000011212 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 661458 + ... + 937830.

Almost surely, 2^221000011212 is an apocalyptic number.

It is an amenable number.

221000011212 is an abundant number, since it is smaller than the sum of its proper divisors (308899597460).

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

221000011212 is a wasteful number, since it uses less digits than its factorization.

221000011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278218 (or 278216 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221000011212 its reverse (212110000122), we get a palindrome (433110011334).

The spelling of 221000011212 in words is "two hundred twenty-one billion, eleven thousand, two hundred twelve".