212040340442 has 32 divisors (see below), whose sum is σ = 394972078080. Its totient is φ = 83314416240.

The previous prime is 212040340439. The next prime is 212040340453. The reversal of 212040340442 is 244043040212.

It is a happy number.

It is a super-2 number, since 2×212040340442² (a number of 23 digits) contains 22 as substring.

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, 12848918 + ... + 12865409.

It is an arithmetic number, because the mean of its divisors is an integer number (12342877440).

Almost surely, 2^212040340442 is an apocalyptic number.

212040340442 is a deficient number, since it is larger than the sum of its proper divisors (182931737638).

212040340442 is a wasteful number, since it uses less digits than its factorization.

212040340442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25714386.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 212040340442 its reverse (244043040212), we get a palindrome (456083380654).

The spelling of 212040340442 in words is "two hundred twelve billion, forty million, three hundred forty thousand, four hundred forty-two".