221101112212 has 24 divisors (see below), whose sum is σ = 392445853632. Its totient is φ = 108974275200.

The previous prime is 221101112189. The next prime is 221101112231. The reversal of 221101112212 is 212211101122.

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, 1616412 + ... + 1747852.

It is an arithmetic number, because the mean of its divisors is an integer number (16351910568).

Almost surely, 2^221101112212 is an apocalyptic number.

It is an amenable number.

221101112212 is a deficient number, since it is larger than the sum of its proper divisors (171344741420).

221101112212 is a wasteful number, since it uses less digits than its factorization.

221101112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137439 (or 137437 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221101112212 its reverse (212211101122), we get a palindrome (433312213334).

The spelling of 221101112212 in words is "two hundred twenty-one billion, one hundred one million, one hundred twelve thousand, two hundred twelve".