221110101012 has 24 divisors (see below), whose sum is σ = 529867450336. Its totient is φ = 71711383968.

The previous prime is 221110101007. The next prime is 221110101031. The reversal of 221110101012 is 210101011122.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248997418 + ... + 248998305.

Almost surely, 2^221110101012 is an apocalyptic number.

It is an amenable number.

221110101012 is an abundant number, since it is smaller than the sum of its proper divisors (308757349324).

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

221110101012 is a wasteful number, since it uses less digits than its factorization.

221110101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497995767 (or 497995765 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221110101012 its reverse (210101011122), we get a palindrome (431211112134).

The spelling of 221110101012 in words is "two hundred twenty-one billion, one hundred ten million, one hundred one thousand, twelve".