120021111331 has 6 divisors (see below), whose sum is σ = 131924031596. Its totient is φ = 109110101100.

The previous prime is 120021111271. The next prime is 120021111359. The reversal of 120021111331 is 133111120021.

It is a happy number.

It is not a de Polignac number, because 120021111331 - 2¹¹ = 120021109283 is a prime.

It is a super-2 number, since 2×120021111331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120021111031) 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 5 ways as a sum of consecutive naturals, for example, 495954885 + ... + 495955126.

Almost surely, 2^120021111331 is an apocalyptic number.

120021111331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120021111331 is a deficient number, since it is larger than the sum of its proper divisors (11902920265).

120021111331 is an equidigital number, since it uses as much as digits as its factorization.

120021111331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991910033 (or 991910022 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 120021111331 its reverse (133111120021), we get a palindrome (253132231352).

The spelling of 120021111331 in words is "one hundred twenty billion, twenty-one million, one hundred eleven thousand, three hundred thirty-one".