120002012021 has 2 divisors, whose sum is σ = 120002012022. Its totient is φ = 120002012020.

The previous prime is 120002011999. The next prime is 120002012041. The reversal of 120002012021 is 120210200021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64287602500 + 55714409521 = 253550^2 + 236039^2 .

It is a cyclic number.

It is not a de Polignac number, because 120002012021 - 2²² = 119997817717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120002011993 and 120002012011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120002012041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60001006010 + 60001006011.

It is an arithmetic number, because the mean of its divisors is an integer number (60001006011).

Almost surely, 2^120002012021 is an apocalyptic number.

It is an amenable number.

120002012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120002012021 is an equidigital number, since it uses as much as digits as its factorization.

120002012021 is an evil number, because the sum of its binary digits is even.

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

Adding to 120002012021 its reverse (120210200021), we get a palindrome (240212212042).

The spelling of 120002012021 in words is "one hundred twenty billion, two million, twelve thousand, twenty-one".