221015910842 has 16 divisors (see below), whose sum is σ = 332536677000. Its totient is φ = 110170573632.

The previous prime is 221015910839. The next prime is 221015910881. The reversal of 221015910842 is 248019510122.

It can be written as a sum of positive squares in 4 ways, for example, as 93794575081 + 127221335761 = 306259^2 + 356681^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1996868 + ... + 2104640.

Almost surely, 2^221015910842 is an apocalyptic number.

221015910842 is a deficient number, since it is larger than the sum of its proper divisors (111520766158).

221015910842 is a wasteful number, since it uses less digits than its factorization.

221015910842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110897.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 221015910842 in words is "two hundred twenty-one billion, fifteen million, nine hundred ten thousand, eight hundred forty-two".