201221109968 has 20 divisors (see below), whose sum is σ = 391614185088. Its totient is φ = 100159384800.

The previous prime is 201221109967. The next prime is 201221110021. The reversal of 201221109968 is 869901122102.

It is a super-2 number, since 2×201221109968² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221109967) 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, 28194458 + ... + 28201593.

Almost surely, 2^201221109968 is an apocalyptic number.

It is an amenable number.

201221109968 is a deficient number, since it is larger than the sum of its proper divisors (190393075120).

201221109968 is a wasteful number, since it uses less digits than its factorization.

201221109968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56396282 (or 56396276 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 201221109968 in words is "two hundred one billion, two hundred twenty-one million, one hundred nine thousand, nine hundred sixty-eight".