221154381205 has 16 divisors (see below), whose sum is σ = 275095699200. Its totient is φ = 170474731840.

The previous prime is 221154381191. The next prime is 221154381223. The reversal of 221154381205 is 502183451122.

It is a de Polignac number, because none of the positive numbers 2^k-221154381205 is a prime.

It is a congruent number.

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, 1481965 + ... + 1624354.

It is an arithmetic number, because the mean of its divisors is an integer number (17193481200).

Almost surely, 2^221154381205 is an apocalyptic number.

It is an amenable number.

221154381205 is a deficient number, since it is larger than the sum of its proper divisors (53941317995).

221154381205 is a wasteful number, since it uses less digits than its factorization.

221154381205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106844.

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 221154381205 in words is "two hundred twenty-one billion, one hundred fifty-four million, three hundred eighty-one thousand, two hundred five".