221770352042361 has 6 divisors (see below), whose sum is σ = 320334952950090. Its totient is φ = 147846901361568.

The previous prime is 221770352042347. The next prime is 221770352042381. The reversal of 221770352042361 is 163240253077122.

221770352042361 is a `hidden beast` number, since 2 + 2 + 17 + 70 + 3 + 5 + 204 + 2 + 361 = 666.

It can be written as a sum of positive squares in only one way, i.e., 207038112214761 + 14732239827600 = 14388819^2 + 3838260^2 .

It is not a de Polignac number, because 221770352042361 - 2¹³ = 221770352034169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221770352042341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12320575113456 + ... + 12320575113473.

It is an arithmetic number, because the mean of its divisors is an integer number (53389158825015).

Almost surely, 2^{221770352042361} is an apocalyptic number.

It is an amenable number.

221770352042361 is a deficient number, since it is larger than the sum of its proper divisors (98564600907729).

221770352042361 is a wasteful number, since it uses less digits than its factorization.

221770352042361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24641150226935 (or 24641150226932 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 221770352042361 in words is "two hundred twenty-one trillion, seven hundred seventy billion, three hundred fifty-two million, forty-two thousand, three hundred sixty-one".