1402021120021 has 2 divisors, whose sum is σ = 1402021120022. Its totient is φ = 1402021120020.

The previous prime is 1402021120001. The next prime is 1402021120043. The reversal of 1402021120021 is 1200211202041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1397939699025 + 4081420996 = 1182345^2 + 63886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402021120021 - 2⁷ = 1402021119893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1402021119977 and 1402021120004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1402021120001) 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 as a sum of consecutive naturals, namely, 701010560010 + 701010560011.

It is an arithmetic number, because the mean of its divisors is an integer number (701010560011).

Almost surely, 2^{1402021120021} is an apocalyptic number.

It is an amenable number.

1402021120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402021120021 is an equidigital number, since it uses as much as digits as its factorization.

1402021120021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1402021120021 its reverse (1200211202041), we get a palindrome (2602232322062).

The spelling of 1402021120021 in words is "one trillion, four hundred two billion, twenty-one million, one hundred twenty thousand, twenty-one".