4142402520021 has 6 divisors (see below), whose sum is σ = 5983470306710. Its totient is φ = 2761601680008.

The previous prime is 4142402519953. The next prime is 4142402520071. The reversal of 4142402520021 is 1200252042414.

It is a happy number.

4142402520021 is a `hidden beast` number, since 41 + 42 + 40 + 2 + 520 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4127861777796 + 14540742225 = 2031714^2 + 120585^2 .

It is not a de Polignac number, because 4142402520021 - 2¹⁰ = 4142402518997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4142402520071) 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 5 ways as a sum of consecutive naturals, for example, 230133473326 + ... + 230133473343.

Almost surely, 2^{4142402520021} is an apocalyptic number.

It is an amenable number.

4142402520021 is a deficient number, since it is larger than the sum of its proper divisors (1841067786689).

4142402520021 is a wasteful number, since it uses less digits than its factorization.

4142402520021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460266946675 (or 460266946672 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 4142402520021 its reverse (1200252042414), we get a palindrome (5342654562435).

The spelling of 4142402520021 in words is "four trillion, one hundred forty-two billion, four hundred two million, five hundred twenty thousand, twenty-one".