213122204211 has 24 divisors (see below), whose sum is σ = 330964665024. Its totient is φ = 121633883280.

The previous prime is 213122204179. The next prime is 213122204219. The reversal of 213122204211 is 112402221312.

It is a happy number.

It is not a de Polignac number, because 213122204211 - 2⁵ = 213122204179 is a prime.

It is a super-2 number, since 2×213122204211² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (213122204219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 774625 + ... + 1013058.

It is an arithmetic number, because the mean of its divisors is an integer number (13790194376).

Almost surely, 2^213122204211 is an apocalyptic number.

213122204211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213122204211 is a deficient number, since it is larger than the sum of its proper divisors (117842460813).

213122204211 is a wasteful number, since it uses less digits than its factorization.

213122204211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788511 (or 1788504 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 213122204211 its reverse (112402221312), we get a palindrome (325524425523).

The spelling of 213122204211 in words is "two hundred thirteen billion, one hundred twenty-two million, two hundred four thousand, two hundred eleven".