402121242241 has 4 divisors (see below), whose sum is σ = 402587200512. Its totient is φ = 401655283972.

The previous prime is 402121242181. The next prime is 402121242301. The reversal of 402121242241 is 142242121204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (402121242181) and next prime (402121242301).

It is a cyclic number.

It is not a de Polignac number, because 402121242241 - 2⁷ = 402121242113 is a prime.

It is a super-2 number, since 2×402121242241² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402121245241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232977841 + ... + 232979566.

It is an arithmetic number, because the mean of its divisors is an integer number (100646800128).

Almost surely, 2^402121242241 is an apocalyptic number.

It is an amenable number.

402121242241 is a deficient number, since it is larger than the sum of its proper divisors (465958271).

402121242241 is an equidigital number, since it uses as much as digits as its factorization.

402121242241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465958270.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 402121242241 its reverse (142242121204), we get a palindrome (544363363445).

The spelling of 402121242241 in words is "four hundred two billion, one hundred twenty-one million, two hundred forty-two thousand, two hundred forty-one".