401202042424121 has 4 divisors (see below), whose sum is σ = 410987458093044. Its totient is φ = 391416626755200.

The previous prime is 401202042424087. The next prime is 401202042424171. The reversal of 401202042424121 is 121424240202104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 216443267664121 + 184758774760000 = 14712011^2 + 13592600^2 .

It is a cyclic number.

It is not a de Polignac number, because 401202042424121 - 2³⁴ = 401184862554937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401202042424171) 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 3 ways as a sum of consecutive naturals, for example, 4892707834400 + ... + 4892707834481.

It is an arithmetic number, because the mean of its divisors is an integer number (102746864523261).

Almost surely, 2^{401202042424121} is an apocalyptic number.

401202042424121 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

401202042424121 is a deficient number, since it is larger than the sum of its proper divisors (9785415668923).

401202042424121 is an equidigital number, since it uses as much as digits as its factorization.

401202042424121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9785415668922.

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

Adding to 401202042424121 its reverse (121424240202104), we get a palindrome (522626282626225).

The spelling of 401202042424121 in words is "four hundred one trillion, two hundred two billion, forty-two million, four hundred twenty-four thousand, one hundred twenty-one".