120012111021 has 8 divisors (see below), whose sum is σ = 174563070624. Its totient is φ = 72734612720.

The previous prime is 120012111013. The next prime is 120012111029. The reversal of 120012111021 is 120111210021.

It is an interprime number because it is at equal distance from previous prime (120012111013) and next prime (120012111029).

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

It is not a de Polignac number, because 120012111021 - 2³ = 120012111013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120012110988 and 120012111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120012111029) 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 7 ways as a sum of consecutive naturals, for example, 1818365286 + ... + 1818365351.

It is an arithmetic number, because the mean of its divisors is an integer number (21820383828).

Almost surely, 2^120012111021 is an apocalyptic number.

120012111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120012111021 is a deficient number, since it is larger than the sum of its proper divisors (54550959603).

120012111021 is a wasteful number, since it uses less digits than its factorization.

120012111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636730651.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 120012111021 its reverse (120111210021), we get a palindrome (240123321042).

The spelling of 120012111021 in words is "one hundred twenty billion, twelve million, one hundred eleven thousand, twenty-one".