1202121997 has 2 divisors, whose sum is σ = 1202121998. Its totient is φ = 1202121996.

The previous prime is 1202121967. The next prime is 1202122013. The reversal of 1202121997 is 7991212021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1058265961 + 143856036 = 32531^2 + 11994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202121997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202121917) 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, 601060998 + 601060999.

It is an arithmetic number, because the mean of its divisors is an integer number (601060999).

Almost surely, 2^1202121997 is an apocalyptic number.

It is an amenable number.

1202121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202121997 is an equidigital number, since it uses as much as digits as its factorization.

1202121997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1202121997 is about 34671.6310115345. The cubic root of 1202121997 is about 1063.2845776352.

The spelling of 1202121997 in words is "one billion, two hundred two million, one hundred twenty-one thousand, nine hundred ninety-seven".