11111210121013 has 4 divisors (see below), whose sum is σ = 11347618847040. Its totient is φ = 10874801394988.

The previous prime is 11111210120981. The next prime is 11111210121029. The reversal of 11111210121013 is 31012101211111.

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 11111210121013 - 2⁵ = 11111210120981 is a prime.

It is a super-2 number, since 2×11111210121013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111210121073) 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, 118204362943 + ... + 118204363036.

It is an arithmetic number, because the mean of its divisors is an integer number (2836904711760).

Almost surely, 2^{11111210121013} is an apocalyptic number.

It is an amenable number.

11111210121013 is a deficient number, since it is larger than the sum of its proper divisors (236408726027).

11111210121013 is an equidigital number, since it uses as much as digits as its factorization.

11111210121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236408726026.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 11111210121013 its reverse (31012101211111), we get a palindrome (42123311332124).

The spelling of 11111210121013 in words is "eleven trillion, one hundred eleven billion, two hundred ten million, one hundred twenty-one thousand, thirteen".