20101111901 has 8 divisors (see below), whose sum is σ = 22588540800. Its totient is φ = 17748138672.

The previous prime is 20101111871. The next prime is 20101111903. The reversal of 20101111901 is 10911110102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20101111901 - 2¹⁸ = 20100849757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20101111901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101111903) by changing a digit.

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, 33613601 + ... + 33614198.

It is an arithmetic number, because the mean of its divisors is an integer number (2823567600).

Almost surely, 2^20101111901 is an apocalyptic number.

It is an amenable number.

20101111901 is a deficient number, since it is larger than the sum of its proper divisors (2487428899).

20101111901 is a wasteful number, since it uses less digits than its factorization.

20101111901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67227835.

The product of its (nonzero) digits is 18, while the sum is 17.

The spelling of 20101111901 in words is "twenty billion, one hundred one million, one hundred eleven thousand, nine hundred one".