402441041021 has 16 divisors (see below), whose sum is σ = 428177063664. Its totient is φ = 376938676224.

The previous prime is 402441040997. The next prime is 402441041053. The reversal of 402441041021 is 120140144204.

It can be written as a sum of positive squares in 8 ways, for example, as 13830936025 + 388610104996 = 117605^2 + 623386^2 .

It is a cyclic number.

It is not a de Polignac number, because 402441041021 - 2⁶ = 402441040957 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 (402441041921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2853461 + ... + 2991173.

It is an arithmetic number, because the mean of its divisors is an integer number (26761066479).

Almost surely, 2^402441041021 is an apocalyptic number.

It is an amenable number.

402441041021 is a deficient number, since it is larger than the sum of its proper divisors (25736022643).

402441041021 is a wasteful number, since it uses less digits than its factorization.

402441041021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138560.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 402441041021 its reverse (120140144204), we get a palindrome (522581185225).

The spelling of 402441041021 in words is "four hundred two billion, four hundred forty-one million, forty-one thousand, twenty-one".