111101020200121 has 4 divisors (see below), whose sum is σ = 126972594514432. Its totient is φ = 95229445885812.

The previous prime is 111101020200047. The next prime is 111101020200139. The reversal of 111101020200121 is 121002020101111.

It is a happy number.

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 not a de Polignac number, because 111101020200121 - 2¹¹ = 111101020198073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111101020500121) 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, 7935787157145 + ... + 7935787157158.

It is an arithmetic number, because the mean of its divisors is an integer number (31743148628608).

Almost surely, 2^{111101020200121} is an apocalyptic number.

It is an amenable number.

111101020200121 is a deficient number, since it is larger than the sum of its proper divisors (15871574314311).

111101020200121 is an equidigital number, since it uses as much as digits as its factorization.

111101020200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15871574314310.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111101020200121 its reverse (121002020101111), we get a palindrome (232103040301232).

The spelling of 111101020200121 in words is "one hundred eleven trillion, one hundred one billion, twenty million, two hundred thousand, one hundred twenty-one".