212443402442 has 32 divisors (see below), whose sum is σ = 330190608384. Its totient is φ = 102406575600.

The previous prime is 212443402429. The next prime is 212443402459. The reversal of 212443402442 is 244204344212.

It is a super-2 number, since 2×212443402442² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212443402399 and 212443402408.

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, 18611717 + ... + 18623127.

It is an arithmetic number, because the mean of its divisors is an integer number (10318456512).

Almost surely, 2^212443402442 is an apocalyptic number.

212443402442 is a deficient number, since it is larger than the sum of its proper divisors (117747205942).

212443402442 is a wasteful number, since it uses less digits than its factorization.

212443402442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12554.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 212443402442 its reverse (244204344212), we get a palindrome (456647746654).

The spelling of 212443402442 in words is "two hundred twelve billion, four hundred forty-three million, four hundred two thousand, four hundred forty-two".