221011212194 has 8 divisors (see below), whose sum is σ = 331844083740. Its totient is φ = 110396517616.

The previous prime is 221011212193. The next prime is 221011212209. The reversal of 221011212194 is 491212110122.

It can be written as a sum of positive squares in 2 ways, for example, as 175153131169 + 45858081025 = 418513^2 + 214145^2 .

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

It is a super-2 number, since 2×221011212194² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221011212193) 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, 54541709 + ... + 54545760.

Almost surely, 2^221011212194 is an apocalyptic number.

221011212194 is a deficient number, since it is larger than the sum of its proper divisors (110832871546).

221011212194 is a wasteful number, since it uses less digits than its factorization.

221011212194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109088484.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 221011212194 in words is "two hundred twenty-one billion, eleven million, two hundred twelve thousand, one hundred ninety-four".