212002231121 has 2 divisors, whose sum is σ = 212002231122. Its totient is φ = 212002231120.

The previous prime is 212002231099. The next prime is 212002231157. The reversal of 212002231121 is 121132200212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136060650496 + 75941580625 = 368864^2 + 275575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212002231121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212002231121.

It is not a weakly prime, because it can be changed into another prime (212002231171) by changing a digit.

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 as a sum of consecutive naturals, namely, 106001115560 + 106001115561.

It is an arithmetic number, because the mean of its divisors is an integer number (106001115561).

Almost surely, 2^212002231121 is an apocalyptic number.

It is an amenable number.

212002231121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212002231121 is an equidigital number, since it uses as much as digits as its factorization.

212002231121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212002231121 its reverse (121132200212), we get a palindrome (333134431333).

The spelling of 212002231121 in words is "two hundred twelve billion, two million, two hundred thirty-one thousand, one hundred twenty-one".