401421012443 has 4 divisors (see below), whose sum is σ = 437913831768. Its totient is φ = 364928193120.

The previous prime is 401421012439. The next prime is 401421012463. The reversal of 401421012443 is 344210124104.

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

It is a cyclic number.

It is not a de Polignac number, because 401421012443 - 2² = 401421012439 is a prime.

It is a super-2 number, since 2×401421012443² (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 (401421012413) 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, 18246409646 + ... + 18246409667.

It is an arithmetic number, because the mean of its divisors is an integer number (109478457942).

Almost surely, 2^401421012443 is an apocalyptic number.

401421012443 is a deficient number, since it is larger than the sum of its proper divisors (36492819325).

401421012443 is a wasteful number, since it uses less digits than its factorization.

401421012443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36492819324.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 401421012443 its reverse (344210124104), we get a palindrome (745631136547).

The spelling of 401421012443 in words is "four hundred one billion, four hundred twenty-one million, twelve thousand, four hundred forty-three".