213421123342 has 32 divisors (see below), whose sum is σ = 387962142912. Its totient is φ = 85957853184.

The previous prime is 213421123301. The next prime is 213421123351. The reversal of 213421123342 is 243321124312.

It is a super-2 number, since 2×213421123342² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213421123342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506043 + ... + 826390.

It is an arithmetic number, because the mean of its divisors is an integer number (12123816966).

Almost surely, 2^213421123342 is an apocalyptic number.

213421123342 is a deficient number, since it is larger than the sum of its proper divisors (174541019570).

213421123342 is a wasteful number, since it uses less digits than its factorization.

213421123342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333132.

The product of its digits is 6912, while the sum is 28.

Adding to 213421123342 its reverse (243321124312), we get a palindrome (456742247654).

The spelling of 213421123342 in words is "two hundred thirteen billion, four hundred twenty-one million, one hundred twenty-three thousand, three hundred forty-two".