2121121320212 has 12 divisors (see below), whose sum is σ = 3764243470176. Its totient is φ = 1045623185880.

The previous prime is 2121121320179. The next prime is 2121121320217. The reversal of 2121121320212 is 2120231211212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121121320217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3734368238 + ... + 3734368805.

It is an arithmetic number, because the mean of its divisors is an integer number (313686955848).

Almost surely, 2^{2121121320212} is an apocalyptic number.

It is an amenable number.

2121121320212 is a deficient number, since it is larger than the sum of its proper divisors (1643122149964).

2121121320212 is a wasteful number, since it uses less digits than its factorization.

2121121320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468737118 (or 7468737116 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2121121320212 its reverse (2120231211212), we get a palindrome (4241352531424).

The spelling of 2121121320212 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, three hundred twenty thousand, two hundred twelve".