400053011221 has 4 divisors (see below), whose sum is σ = 400058292172. Its totient is φ = 400047730272.

The previous prime is 400053011213. The next prime is 400053011273. The reversal of 400053011221 is 122110350004.

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 372849456996 + 27203554225 = 610614^2 + 164935^2 .

It is a cyclic number.

It is not a de Polignac number, because 400053011221 - 2³ = 400053011213 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 (400053011201) 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, 2525166 + ... + 2678911.

It is an arithmetic number, because the mean of its divisors is an integer number (100014573043).

Almost surely, 2^400053011221 is an apocalyptic number.

It is an amenable number.

400053011221 is a deficient number, since it is larger than the sum of its proper divisors (5280951).

400053011221 is an equidigital number, since it uses as much as digits as its factorization.

400053011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280950.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 400053011221 its reverse (122110350004), we get a palindrome (522163361225).

The spelling of 400053011221 in words is "four hundred billion, fifty-three million, eleven thousand, two hundred twenty-one".