120021313312031 has 4 divisors (see below), whose sum is σ = 126338224539000. Its totient is φ = 113704402085064.

The previous prime is 120021313312013. The next prime is 120021313312039. The reversal of 120021313312031 is 130213313120021.

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

It is a cyclic number.

It is not a de Polignac number, because 120021313312031 - 2⁴² = 115623266800927 is a prime.

It is a super-2 number, since 2×120021313312031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120021313311988 and 120021313312006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021313312039) 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, 3158455613456 + ... + 3158455613493.

It is an arithmetic number, because the mean of its divisors is an integer number (31584556134750).

Almost surely, 2^{120021313312031} is an apocalyptic number.

120021313312031 is a deficient number, since it is larger than the sum of its proper divisors (6316911226969).

120021313312031 is an equidigital number, since it uses as much as digits as its factorization.

120021313312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6316911226968.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 120021313312031 its reverse (130213313120021), we get a palindrome (250234626432052).

The spelling of 120021313312031 in words is "one hundred twenty trillion, twenty-one billion, three hundred thirteen million, three hundred twelve thousand, thirty-one".