1202212157 has 2 divisors, whose sum is σ = 1202212158. Its totient is φ = 1202212156.

The previous prime is 1202212111. The next prime is 1202212163. The reversal of 1202212157 is 7512122021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 611770756 + 590441401 = 24734^2 + 24299^2 .

It is an emirp because it is prime and its reverse (7512122021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1202212157 - 2¹⁰ = 1202211133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202212057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601106078 + 601106079.

It is an arithmetic number, because the mean of its divisors is an integer number (601106079).

Almost surely, 2^1202212157 is an apocalyptic number.

It is an amenable number.

1202212157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202212157 is an equidigital number, since it uses as much as digits as its factorization.

1202212157 is an evil number, because the sum of its binary digits is even.

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

The square root of 1202212157 is about 34672.9311855805. The cubic root of 1202212157 is about 1063.3111593358.

Adding to 1202212157 its reverse (7512122021), we get a palindrome (8714334178).

The spelling of 1202212157 in words is "one billion, two hundred two million, two hundred twelve thousand, one hundred fifty-seven".