221103121986 has 32 divisors (see below), whose sum is σ = 494594198400. Its totient is φ = 73212951600.

The previous prime is 221103121979. The next prime is 221103121997. The reversal of 221103121986 is 689121301122.

It is a super-3 number, since 3×221103121986³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221103121986.

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, 13549801 + ... + 13566108.

It is an arithmetic number, because the mean of its divisors is an integer number (15456068700).

Almost surely, 2^221103121986 is an apocalyptic number.

221103121986 is an abundant number, since it is smaller than the sum of its proper divisors (273491076414).

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

221103121986 is a wasteful number, since it uses less digits than its factorization.

221103121986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27116071 (or 27116065 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 221103121986 in words is "two hundred twenty-one billion, one hundred three million, one hundred twenty-one thousand, nine hundred eighty-six".