201101209979 has 4 divisors (see below), whose sum is σ = 201114542160. Its totient is φ = 201087877800.

The previous prime is 201101209951. The next prime is 201101209993. The reversal of 201101209979 is 979902101102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201101209979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201101209279) 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, 6643439 + ... + 6673640.

It is an arithmetic number, because the mean of its divisors is an integer number (50278635540).

Almost surely, 2^201101209979 is an apocalyptic number.

201101209979 is a deficient number, since it is larger than the sum of its proper divisors (13332181).

201101209979 is a wasteful number, since it uses less digits than its factorization.

201101209979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13332180.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 201101209979 in words is "two hundred one billion, one hundred one million, two hundred nine thousand, nine hundred seventy-nine".