221112121986 has 48 divisors (see below), whose sum is σ = 547737899904. Its totient is φ = 63149257152.

The previous prime is 221112121973. The next prime is 221112122003. The reversal of 221112121986 is 689121211122.

It is a self number, because there is not a number n which added to its sum of digits gives 221112121986.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43206 + ... + 666401.

It is an arithmetic number, because the mean of its divisors is an integer number (11411206248).

Almost surely, 2^221112121986 is an apocalyptic number.

221112121986 is an abundant number, since it is smaller than the sum of its proper divisors (326625777918).

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

221112121986 is a wasteful number, since it uses less digits than its factorization.

221112121986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712095 (or 712092 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The spelling of 221112121986 in words is "two hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, nine hundred eighty-six".