212121113043340 has 12 divisors (see below), whose sum is σ = 445454337391056. Its totient is φ = 84848445217328.

The previous prime is 212121113043331. The next prime is 212121113043391. The reversal of 212121113043340 is 43340311121212.

It is a junction number, because it is equal to n+sod(n) for n = 212121113043299 and 212121113043308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5303027826064 + ... + 5303027826103.

It is an arithmetic number, because the mean of its divisors is an integer number (37121194782588).

Almost surely, 2^{212121113043340} is an apocalyptic number.

212121113043340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121113043340 is an abundant number, since it is smaller than the sum of its proper divisors (233333224347716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212121113043340 is a wasteful number, since it uses less digits than its factorization.

212121113043340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606055652176 (or 10606055652174 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 212121113043340 its reverse (43340311121212), we get a palindrome (255461424164552).

The spelling of 212121113043340 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred thirteen million, forty-three thousand, three hundred forty".