221011222012 has 24 divisors (see below), whose sum is σ = 442102728704. Its totient is φ = 94701891312.

The previous prime is 221011221971. The next prime is 221011222031. The reversal of 221011222012 is 210222110122.

It is a happy number.

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, 559308 + ... + 868819.

Almost surely, 2^221011222012 is an apocalyptic number.

It is an amenable number.

221011222012 is an abundant number, since it is smaller than the sum of its proper divisors (221091506692).

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

221011222012 is a wasteful number, since it uses less digits than its factorization.

221011222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433665 (or 1433663 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221011222012 its reverse (210222110122), we get a palindrome (431233332134).

The spelling of 221011222012 in words is "two hundred twenty-one billion, eleven million, two hundred twenty-two thousand, twelve".