121111231013 has 4 divisors (see below), whose sum is σ = 121111929600. Its totient is φ = 121110532428.

The previous prime is 121111231009. The next prime is 121111231127. The reversal of 121111231013 is 310132111121.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121111231013 - 2² = 121111231009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111230982 and 121111231000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111233013) 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, 129788 + ... + 508986.

It is an arithmetic number, because the mean of its divisors is an integer number (30277982400).

Almost surely, 2^121111231013 is an apocalyptic number.

It is an amenable number.

121111231013 is a deficient number, since it is larger than the sum of its proper divisors (698587).

121111231013 is an equidigital number, since it uses as much as digits as its factorization.

121111231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698586.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 121111231013 its reverse (310132111121), we get a palindrome (431243342134).

The spelling of 121111231013 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred thirty-one thousand, thirteen".