401155432210421 has 4 divisors (see below), whose sum is σ = 458463351097632. Its totient is φ = 343847513323212.

The previous prime is 401155432210397. The next prime is 401155432210453. The reversal of 401155432210421 is 124012234551104.

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 a cyclic number.

It is not a de Polignac number, because 401155432210421 - 2³⁰ = 401154358468597 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 (401155432210121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28653959443595 + ... + 28653959443608.

It is an arithmetic number, because the mean of its divisors is an integer number (114615837774408).

Almost surely, 2^{401155432210421} is an apocalyptic number.

It is an amenable number.

401155432210421 is a deficient number, since it is larger than the sum of its proper divisors (57307918887211).

401155432210421 is an equidigital number, since it uses as much as digits as its factorization.

401155432210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57307918887210.

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 401155432210421 its reverse (124012234551104), we get a palindrome (525167666761525).

The spelling of 401155432210421 in words is "four hundred one trillion, one hundred fifty-five billion, four hundred thirty-two million, two hundred ten thousand, four hundred twenty-one".