400221402211 has 4 divisors (see below), whose sum is σ = 400227343272. Its totient is φ = 400215461152.

The previous prime is 400221402181. The next prime is 400221402233. The reversal of 400221402211 is 112204122004.

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 400221402211 - 2⁵ = 400221402179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400221402271) 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, 2868310 + ... + 3004603.

It is an arithmetic number, because the mean of its divisors is an integer number (100056835818).

Almost surely, 2^400221402211 is an apocalyptic number.

400221402211 is a deficient number, since it is larger than the sum of its proper divisors (5941061).

400221402211 is an equidigital number, since it uses as much as digits as its factorization.

400221402211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5941060.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 400221402211 its reverse (112204122004), we get a palindrome (512425524215).

The spelling of 400221402211 in words is "four hundred billion, two hundred twenty-one million, four hundred two thousand, two hundred eleven".