221999999950 has 24 divisors (see below), whose sum is σ = 412996535280. Its totient is φ = 88783540800.

The previous prime is 221999999833. The next prime is 221999999981. The reversal of 221999999950 is 59999999122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137215 + ... + 680314.

It is an arithmetic number, because the mean of its divisors is an integer number (17208188970).

Almost surely, 2^221999999950 is an apocalyptic number.

221999999950 is a deficient number, since it is larger than the sum of its proper divisors (190996535330).

221999999950 is a wasteful number, since it uses less digits than its factorization.

221999999950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822972 (or 822967 counting only the distinct ones).

The product of its (nonzero) digits is 95659380, while the sum is 73.

The spelling of 221999999950 in words is "two hundred twenty-one billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty".