2213121301816 has 16 divisors (see below), whose sum is σ = 4283460584640. Its totient is φ = 1070865145920.

The previous prime is 2213121301799. The next prime is 2213121301837. The reversal of 2213121301816 is 6181031213122.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4461937861 + ... + 4461938356.

It is an arithmetic number, because the mean of its divisors is an integer number (267716286540).

Almost surely, 2^{2213121301816} is an apocalyptic number.

It is an amenable number.

2213121301816 is a deficient number, since it is larger than the sum of its proper divisors (2070339282824).

2213121301816 is a wasteful number, since it uses less digits than its factorization.

2213121301816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8923876254 (or 8923876250 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 2213121301816 its reverse (6181031213122), we get a palindrome (8394152514938).

The spelling of 2213121301816 in words is "two trillion, two hundred thirteen billion, one hundred twenty-one million, three hundred one thousand, eight hundred sixteen".