111201120202121 has 4 divisors (see below), whose sum is σ = 111212946343632. Its totient is φ = 111189294060612.

The previous prime is 111201120202111. The next prime is 111201120202147. The reversal of 111201120202121 is 121202021102111.

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 not a de Polignac number, because 111201120202121 - 2³⁴ = 111183940332937 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 111201120202121.

It is not an unprimeable number, because it can be changed into a prime (111201120202111) 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, 5913056651 + ... + 5913075456.

It is an arithmetic number, because the mean of its divisors is an integer number (27803236585908).

Almost surely, 2^{111201120202121} is an apocalyptic number.

It is an amenable number.

111201120202121 is a deficient number, since it is larger than the sum of its proper divisors (11826141511).

111201120202121 is an equidigital number, since it uses as much as digits as its factorization.

111201120202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11826141510.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111201120202121 its reverse (121202021102111), we get a palindrome (232403141304232).

The spelling of 111201120202121 in words is "one hundred eleven trillion, two hundred one billion, one hundred twenty million, two hundred two thousand, one hundred twenty-one".