120001311021 has 4 divisors (see below), whose sum is σ = 160001748032. Its totient is φ = 80000874012.

The previous prime is 120001311011. The next prime is 120001311071. The reversal of 120001311021 is 120113100021.

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 not a de Polignac number, because 120001311021 - 2⁷ = 120001310893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120001310988 and 120001311006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001311011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20000218501 + ... + 20000218506.

It is an arithmetic number, because the mean of its divisors is an integer number (40000437008).

Almost surely, 2^120001311021 is an apocalyptic number.

It is an amenable number.

120001311021 is a deficient number, since it is larger than the sum of its proper divisors (40000437011).

120001311021 is an equidigital number, since it uses as much as digits as its factorization.

120001311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40000437010.

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

Adding to 120001311021 its reverse (120113100021), we get a palindrome (240114411042).

The spelling of 120001311021 in words is "one hundred twenty billion, one million, three hundred eleven thousand, twenty-one".