221165145142 has 8 divisors (see below), whose sum is σ = 338806179936. Its totient is φ = 108229751832.

The previous prime is 221165145139. The next prime is 221165145163. The reversal of 221165145142 is 241541561122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221165145098 and 221165145107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176410253 + ... + 1176410440.

It is an arithmetic number, because the mean of its divisors is an integer number (42350772492).

Almost surely, 2^221165145142 is an apocalyptic number.

221165145142 is a deficient number, since it is larger than the sum of its proper divisors (117641034794).

221165145142 is a wasteful number, since it uses less digits than its factorization.

221165145142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352820742.

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

The spelling of 221165145142 in words is "two hundred twenty-one billion, one hundred sixty-five million, one hundred forty-five thousand, one hundred forty-two".