221201019974 has 16 divisors (see below), whose sum is σ = 381016111680. Its totient is φ = 95254027560.

The previous prime is 221201019959. The next prime is 221201019997. The reversal of 221201019974 is 479910102122.

It is a super-3 number, since 3×221201019974³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264594104 + ... + 264594939.

It is an arithmetic number, because the mean of its divisors is an integer number (23813506980).

Almost surely, 2^221201019974 is an apocalyptic number.

221201019974 is a deficient number, since it is larger than the sum of its proper divisors (159815091706).

221201019974 is a wasteful number, since it uses less digits than its factorization.

221201019974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529189075.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 221201019974 in words is "two hundred twenty-one billion, two hundred one million, nineteen thousand, nine hundred seventy-four".