120010101021 has 12 divisors (see below), whose sum is σ = 173365476700. Its totient is φ = 79998632640.

The previous prime is 120010101007. The next prime is 120010101041. The reversal of 120010101021 is 120101010021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 41097425625 + 78912675396 = 202725^2 + 280914^2 .

It is not a de Polignac number, because 120010101021 - 2¹⁰ = 120010099997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120010100994 and 120010101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120010101041) 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 11 ways as a sum of consecutive naturals, for example, 580600 + ... + 759681.

Almost surely, 2^120010101021 is an apocalyptic number.

It is an amenable number.

120010101021 is a deficient number, since it is larger than the sum of its proper divisors (53355375679).

120010101021 is a wasteful number, since it uses less digits than its factorization.

120010101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350236 (or 1350233 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 120010101021 its reverse (120101010021), we get a palindrome (240111111042).

The spelling of 120010101021 in words is "one hundred twenty billion, ten million, one hundred one thousand, twenty-one".