400220211211 has 4 divisors (see below), whose sum is σ = 400714921800. Its totient is φ = 399725500624.

The previous prime is 400220211203. The next prime is 400220211229. The reversal of 400220211211 is 112112022004.

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 400220211211 - 2³ = 400220211203 is a prime.

It is a super-3 number, since 3×400220211211³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400220211271) 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, 247354081 + ... + 247355698.

It is an arithmetic number, because the mean of its divisors is an integer number (100178730450).

Almost surely, 2^400220211211 is an apocalyptic number.

400220211211 is a deficient number, since it is larger than the sum of its proper divisors (494710589).

400220211211 is an equidigital number, since it uses as much as digits as its factorization.

400220211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494710588.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 400220211211 its reverse (112112022004), we get a palindrome (512332233215).

The spelling of 400220211211 in words is "four hundred billion, two hundred twenty million, two hundred eleven thousand, two hundred eleven".