212021121131 has 2 divisors, whose sum is σ = 212021121132.
Its totient is φ = 212021121130.
The previous prime is 212021121107. The next prime is 212021121139. The reversal of 212021121131 is 131121120212.
It is a happy number.
212021121131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 212021121131 - 226 = 211954012267 is a prime.
It is a super-2 number, since 2×2120211211312 (a number of 23 digits) contains 22 as substring.
It is a Sophie Germain prime.
It is not a weakly prime, because it can be changed into another prime (212021121139) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010560565 + 106010560566.
It is an arithmetic number, because the mean of its divisors is an integer number (106010560566).
Almost surely, 2212021121131 is an apocalyptic number.
212021121131 is a deficient number, since it is larger than the sum of its proper divisors (1).
212021121131 is an equidigital number, since it uses as much as digits as its factorization.
212021121131 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 48, while the sum is 17.
Adding to 212021121131 its reverse (131121120212), we get a palindrome (343142241343).
The spelling of 212021121131 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, one hundred thirty-one".