120001111121 has 8 divisors (see below), whose sum is σ = 124143263400. Its totient is φ = 115859237760.

The previous prime is 120001111037. The next prime is 120001111127. The reversal of 120001111121 is 121111100021.

It can be written as a sum of positive squares in 4 ways, for example, as 13505926225 + 106495184896 = 116215^2 + 326336^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 120001111121 - 2¹⁴ = 120001094737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120001111127) 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, 1194095 + ... + 1290683.

It is an arithmetic number, because the mean of its divisors is an integer number (15517907925).

Almost surely, 2^120001111121 is an apocalyptic number.

It is an amenable number.

120001111121 is a deficient number, since it is larger than the sum of its proper divisors (4142152279).

120001111121 is an equidigital number, since it uses as much as digits as its factorization.

120001111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139459.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 120001111121 its reverse (121111100021), we get a palindrome (241112211142).

The spelling of 120001111121 in words is "one hundred twenty billion, one million, one hundred eleven thousand, one hundred twenty-one".