120121111110001 has 4 divisors (see below), whose sum is σ = 127187058822372. Its totient is φ = 113055163397632.

The previous prime is 120121111109903. The next prime is 120121111110029. The reversal of 120121111110001 is 100011111121021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106173425794401 + 13947685315600 = 10304049^2 + 3734660^2 .

It is a cyclic number.

It is not a de Polignac number, because 120121111110001 - 2⁷ = 120121111109873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120121111120001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3532973856160 + ... + 3532973856193.

It is an arithmetic number, because the mean of its divisors is an integer number (31796764705593).

Almost surely, 2^{120121111110001} is an apocalyptic number.

It is an amenable number.

120121111110001 is a deficient number, since it is larger than the sum of its proper divisors (7065947712371).

120121111110001 is an equidigital number, since it uses as much as digits as its factorization.

120121111110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7065947712370.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 120121111110001 its reverse (100011111121021), we get a palindrome (220132222231022).

The spelling of 120121111110001 in words is "one hundred twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred ten thousand, one".