120210020021 has 32 divisors (see below), whose sum is σ = 156090224640. Its totient is φ = 89901399744.

The previous prime is 120210020009. The next prime is 120210020083. The reversal of 120210020021 is 120020012021.

It is a happy number.

It is not a de Polignac number, because 120210020021 - 2⁶ = 120210019957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120210019984 and 120210020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120210080021) 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 31 ways as a sum of consecutive naturals, for example, 687476 + ... + 844418.

It is an arithmetic number, because the mean of its divisors is an integer number (4877819520).

Almost surely, 2^120210020021 is an apocalyptic number.

It is an amenable number.

120210020021 is a deficient number, since it is larger than the sum of its proper divisors (35880204619).

120210020021 is a wasteful number, since it uses less digits than its factorization.

120210020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157425.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 120210020021 its reverse (120020012021), we get a palindrome (240230032042).

The spelling of 120210020021 in words is "one hundred twenty billion, two hundred ten million, twenty thousand, twenty-one".