2121020112212 has 12 divisors (see below), whose sum is σ = 3717575817396. Its totient is φ = 1058855592960.

The previous prime is 2121020112209. The next prime is 2121020112217. The reversal of 2121020112212 is 2122110201212.

It can be written as a sum of positive squares in 2 ways, for example, as 733534009156 + 1387486103056 = 856466^2 + 1177916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020112217) 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, 413612903 + ... + 413618030.

It is an arithmetic number, because the mean of its divisors is an integer number (309797984783).

Almost surely, 2^{2121020112212} is an apocalyptic number.

It is an amenable number.

2121020112212 is a deficient number, since it is larger than the sum of its proper divisors (1596555705184).

2121020112212 is a wasteful number, since it uses less digits than its factorization.

2121020112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827231578 (or 827231576 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2121020112212 its reverse (2122110201212), we get a palindrome (4243130313424).

The spelling of 2121020112212 in words is "two trillion, one hundred twenty-one billion, twenty million, one hundred twelve thousand, two hundred twelve".