212001220157 has 2 divisors, whose sum is σ = 212001220158. Its totient is φ = 212001220156.

The previous prime is 212001220111. The next prime is 212001220163. The reversal of 212001220157 is 751022100212.

212001220157 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 can be written as a sum of positive squares in only one way, i.e., 171122041561 + 40879178596 = 413669^2 + 202186^2 .

It is a cyclic number.

It is not a de Polignac number, because 212001220157 - 2¹² = 212001216061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212001220657) 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, 106000610078 + 106000610079.

It is an arithmetic number, because the mean of its divisors is an integer number (106000610079).

Almost surely, 2^212001220157 is an apocalyptic number.

It is an amenable number.

212001220157 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001220157 is an equidigital number, since it uses as much as digits as its factorization.

212001220157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 212001220157 its reverse (751022100212), we get a palindrome (963023320369).

The spelling of 212001220157 in words is "two hundred twelve billion, one million, two hundred twenty thousand, one hundred fifty-seven".