221920361859198 has 32 divisors (see below), whose sum is σ = 469950004673280. Its totient is φ = 69621925703040.

The previous prime is 221920361859121. The next prime is 221920361859223. The reversal of 221920361859198 is 891958163029122.

It is a Curzon number.

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, 51868863 + ... + 55984101.

It is an arithmetic number, because the mean of its divisors is an integer number (14685937646040).

Almost surely, 2^{221920361859198} is an apocalyptic number.

221920361859198 is an abundant number, since it is smaller than the sum of its proper divisors (248029642814082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221920361859198 is a wasteful number, since it uses less digits than its factorization.

221920361859198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643952.

The product of its (nonzero) digits is 33592320, while the sum is 66.

The spelling of 221920361859198 in words is "two hundred twenty-one trillion, nine hundred twenty billion, three hundred sixty-one million, eight hundred fifty-nine thousand, one hundred ninety-eight".