2161213342012 has 24 divisors (see below), whose sum is σ = 3909131364096. Its totient is φ = 1044872682288.

The previous prime is 2161213341997. The next prime is 2161213342039. The reversal of 2161213342012 is 2102433121612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69236298 + ... + 69267505.

It is an arithmetic number, because the mean of its divisors is an integer number (162880473504).

Almost surely, 2^{2161213342012} is an apocalyptic number.

It is an amenable number.

2161213342012 is a deficient number, since it is larger than the sum of its proper divisors (1747918022084).

2161213342012 is a wasteful number, since it uses less digits than its factorization.

2161213342012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138503937 (or 138503935 counting only the distinct ones).

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

Adding to 2161213342012 its reverse (2102433121612), we get a palindrome (4263646463624).

The spelling of 2161213342012 in words is "two trillion, one hundred sixty-one billion, two hundred thirteen million, three hundred forty-two thousand, twelve".