111202121121213 has 4 divisors (see below), whose sum is σ = 148269494828288. Its totient is φ = 74134747414140.

The previous prime is 111202121121193. The next prime is 111202121121227. The reversal of 111202121121213 is 312121121202111.

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 111202121121213 - 2¹⁷ = 111202120990141 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 111202121121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111202121121713) 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, 18533686853533 + ... + 18533686853538.

It is an arithmetic number, because the mean of its divisors is an integer number (37067373707072).

Almost surely, 2^{111202121121213} is an apocalyptic number.

It is an amenable number.

111202121121213 is a deficient number, since it is larger than the sum of its proper divisors (37067373707075).

111202121121213 is an equidigital number, since it uses as much as digits as its factorization.

111202121121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37067373707074.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 111202121121213 its reverse (312121121202111), we get a palindrome (423323242323324).

The spelling of 111202121121213 in words is "one hundred eleven trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred thirteen".