401340444021 has 48 divisors (see below), whose sum is σ = 669703956480. Its totient is φ = 228898575360.

The previous prime is 401340444007. The next prime is 401340444061. The reversal of 401340444021 is 120444043104.

It is not a de Polignac number, because 401340444021 - 2¹⁵ = 401340411253 is a prime.

It is a super-2 number, since 2×401340444021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401340444061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22177945 + ... + 22196033.

It is an arithmetic number, because the mean of its divisors is an integer number (13952165760).

Almost surely, 2^401340444021 is an apocalyptic number.

It is an amenable number.

401340444021 is a deficient number, since it is larger than the sum of its proper divisors (268363512459).

401340444021 is a wasteful number, since it uses less digits than its factorization.

401340444021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31306 (or 31303 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 401340444021 its reverse (120444043104), we get a palindrome (521784487125).

The spelling of 401340444021 in words is "four hundred one billion, three hundred forty million, four hundred forty-four thousand, twenty-one".