121111231320121 has 8 divisors (see below), whose sum is σ = 138415232061504. Its totient is φ = 103807829645520.

The previous prime is 121111231320083. The next prime is 121111231320193. The reversal of 121111231320121 is 121023132111121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121111231320121 - 2¹⁵ = 121111231287353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111231320092 and 121111231320101.

It is not an unprimeable number, because it can be changed into a prime (121111231320421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149333395 + ... + 150142216.

It is an arithmetic number, because the mean of its divisors is an integer number (17301904007688).

Almost surely, 2^{121111231320121} is an apocalyptic number.

It is an amenable number.

121111231320121 is a deficient number, since it is larger than the sum of its proper divisors (17304000741383).

121111231320121 is an equidigital number, since it uses as much as digits as its factorization.

121111231320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299533391.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 121111231320121 its reverse (121023132111121), we get a palindrome (242134363431242).

The spelling of 121111231320121 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred thirty-one million, three hundred twenty thousand, one hundred twenty-one".