201200099981 has 4 divisors (see below), whose sum is σ = 201260724000. Its totient is φ = 201139475964.

The previous prime is 201200099957. The next prime is 201200100077. The reversal of 201200099981 is 189990002102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201200099981 is a prime.

It is a super-2 number, since 2×201200099981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201200099921) 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, 30307031 + ... + 30313668.

It is an arithmetic number, because the mean of its divisors is an integer number (50315181000).

Almost surely, 2^201200099981 is an apocalyptic number.

It is an amenable number.

201200099981 is a deficient number, since it is larger than the sum of its proper divisors (60624019).

201200099981 is an equidigital number, since it uses as much as digits as its factorization.

201200099981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60624018.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 201200099981 in words is "two hundred one billion, two hundred million, ninety-nine thousand, nine hundred eighty-one".