401338021 has 4 divisors (see below), whose sum is σ = 458672032. Its totient is φ = 344004012.

The previous prime is 401338009. The next prime is 401338031. The reversal of 401338021 is 120833104.

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 a de Polignac number, because none of the positive numbers 2^k-401338021 is a prime.

It is a super-2 number, since 2×401338021² = 322144414200392882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401337983 and 401338001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401338031) 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, 28666995 + ... + 28667008.

It is an arithmetic number, because the mean of its divisors is an integer number (114668008).

Almost surely, 2^401338021 is an apocalyptic number.

It is an amenable number.

401338021 is a deficient number, since it is larger than the sum of its proper divisors (57334011).

401338021 is an equidigital number, since it uses as much as digits as its factorization.

401338021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57334010.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 401338021 is about 20033.4225982482. The cubic root of 401338021 is about 737.6269373002.

The spelling of 401338021 in words is "four hundred one million, three hundred thirty-eight thousand, twenty-one".