212021131208 has 8 divisors (see below), whose sum is σ = 397539621030. Its totient is φ = 106010565600.

The previous prime is 212021131207. The next prime is 212021131213. The reversal of 212021131208 is 802131120212.

It can be written as a sum of positive squares in only one way, i.e., 121673997124 + 90347134084 = 348818^2 + 300578^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (212021131207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13251320693 + ... + 13251320708.

Almost surely, 2^212021131208 is an apocalyptic number.

It is an amenable number.

212021131208 is a deficient number, since it is larger than the sum of its proper divisors (185518489822).

212021131208 is a wasteful number, since it uses less digits than its factorization.

212021131208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26502641407 (or 26502641403 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The spelling of 212021131208 in words is "two hundred twelve billion, twenty-one million, one hundred thirty-one thousand, two hundred eight".