213443040122 has 16 divisors (see below), whose sum is σ = 344801215752. Its totient is φ = 98509711680.

The previous prime is 213443040121. The next prime is 213443040131. The reversal of 213443040122 is 221040344312.

213443040122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 145237972201 + 68205067921 = 381101^2 + 261161^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 213443040091 and 213443040100.

It is not an unprimeable number, because it can be changed into a prime (213443040121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342808 + ... + 1493324.

Almost surely, 2^213443040122 is an apocalyptic number.

213443040122 is a deficient number, since it is larger than the sum of its proper divisors (131358175630).

213443040122 is a wasteful number, since it uses less digits than its factorization.

213443040122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205073.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 213443040122 its reverse (221040344312), we get a palindrome (434483384434).

The spelling of 213443040122 in words is "two hundred thirteen billion, four hundred forty-three million, forty thousand, one hundred twenty-two".