213221424142 has 16 divisors (see below), whose sum is σ = 339934008960. Its totient is φ = 100019041272.

The previous prime is 213221424139. The next prime is 213221424149. The reversal of 213221424142 is 241424122312.

It is a self number, because there is not a number n which added to its sum of digits gives 213221424142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213221424149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27234388 + ... + 27242215.

It is an arithmetic number, because the mean of its divisors is an integer number (21245875560).

Almost surely, 2^213221424142 is an apocalyptic number.

213221424142 is a deficient number, since it is larger than the sum of its proper divisors (126712584818).

213221424142 is a wasteful number, since it uses less digits than its factorization.

213221424142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54476727.

The product of its digits is 6144, while the sum is 28.

Adding to 213221424142 its reverse (241424122312), we get a palindrome (454645546454).

The spelling of 213221424142 in words is "two hundred thirteen billion, two hundred twenty-one million, four hundred twenty-four thousand, one hundred forty-two".