2012220157 has 2 divisors, whose sum is σ = 2012220158. Its totient is φ = 2012220156.

The previous prime is 2012220121. The next prime is 2012220163. The reversal of 2012220157 is 7510222102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1764504036 + 247716121 = 42006^2 + 15739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012220157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012224157) 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, 1006110078 + 1006110079.

It is an arithmetic number, because the mean of its divisors is an integer number (1006110079).

Almost surely, 2^2012220157 is an apocalyptic number.

It is an amenable number.

2012220157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012220157 is an equidigital number, since it uses as much as digits as its factorization.

2012220157 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 22.

The square root of 2012220157 is about 44857.7769957451. The cubic root of 2012220157 is about 1262.4819134356.

Adding to 2012220157 its reverse (7510222102), we get a palindrome (9522442259).

The spelling of 2012220157 in words is "two billion, twelve million, two hundred twenty thousand, one hundred fifty-seven".