120000000021 has 8 divisors (see below), whose sum is σ = 174545454624. Its totient is φ = 72727272720.

The previous prime is 120000000013. The next prime is 120000000089.

It is a happy number.

120000000021 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 120000000021 - 2³ = 120000000013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 119999999937 and 120000000009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000000011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1818181786 + ... + 1818181851.

It is an arithmetic number, because the mean of its divisors is an integer number (21818181828).

Almost surely, 2^120000000021 is an apocalyptic number.

120000000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120000000021 is a deficient number, since it is larger than the sum of its proper divisors (54545454603).

120000000021 is a wasteful number, since it uses less digits than its factorization.

120000000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636363651.

The product of its (nonzero) digits is 4, while the sum is 6.

It can be divided in two parts, 1200000000 and 21, that added together give a palindrome (1200000021).

The spelling of 120000000021 in words is "one hundred twenty billion, twenty-one", and thus it is an aban number.