402144241421 has 16 divisors (see below), whose sum is σ = 461852596800. Its totient is φ = 346860672768.

The previous prime is 402144241417. The next prime is 402144241427. The reversal of 402144241421 is 124142441204.

It is a cyclic number.

It is not a de Polignac number, because 402144241421 - 2² = 402144241417 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 (402144241427) 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 in 15 ways as a sum of consecutive naturals, for example, 6514811 + ... + 6576248.

It is an arithmetic number, because the mean of its divisors is an integer number (28865787300).

Almost surely, 2^402144241421 is an apocalyptic number.

It is an amenable number.

402144241421 is a deficient number, since it is larger than the sum of its proper divisors (59708355379).

402144241421 is a wasteful number, since it uses less digits than its factorization.

402144241421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13091228.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 402144241421 its reverse (124142441204), we get a palindrome (526286682625).

The spelling of 402144241421 in words is "four hundred two billion, one hundred forty-four million, two hundred forty-one thousand, four hundred twenty-one".