221313881890 has 8 divisors (see below), whose sum is σ = 398364987420. Its totient is φ = 88525552752.

The previous prime is 221313881861. The next prime is 221313881891. The reversal of 221313881890 is 98188313122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 206096932441 + 15216949449 = 453979^2 + 123357^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 221313881890.

It is not an unprimeable number, because it can be changed into a prime (221313881891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11065694085 + ... + 11065694104.

Almost surely, 2^221313881890 is an apocalyptic number.

221313881890 is a deficient number, since it is larger than the sum of its proper divisors (177051105530).

221313881890 is a wasteful number, since it uses less digits than its factorization.

221313881890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22131388196.

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 221313881890 in words is "two hundred twenty-one billion, three hundred thirteen million, eight hundred eighty-one thousand, eight hundred ninety".