401343621121 has 4 divisors (see below), whose sum is σ = 405853100100. Its totient is φ = 396834142144.

The previous prime is 401343621053. The next prime is 401343621137. The reversal of 401343621121 is 121126343104.

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 169249960000 + 232093661121 = 411400^2 + 481761^2 .

It is a cyclic number.

It is not a de Polignac number, because 401343621121 - 2⁹ = 401343620609 is a prime.

It is a super-2 number, since 2×401343621121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401343621121.

It is not an unprimeable number, because it can be changed into a prime (401343621221) 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, 2254739356 + ... + 2254739533.

It is an arithmetic number, because the mean of its divisors is an integer number (101463275025).

Almost surely, 2^401343621121 is an apocalyptic number.

It is an amenable number.

401343621121 is a deficient number, since it is larger than the sum of its proper divisors (4509478979).

401343621121 is an equidigital number, since it uses as much as digits as its factorization.

401343621121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509478978.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 401343621121 its reverse (121126343104), we get a palindrome (522469964225).

The spelling of 401343621121 in words is "four hundred one billion, three hundred forty-three million, six hundred twenty-one thousand, one hundred twenty-one".