1202021173 has 2 divisors, whose sum is σ = 1202021174. Its totient is φ = 1202021172.

The previous prime is 1202021141. The next prime is 1202021207. The reversal of 1202021173 is 3711202021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1134813969 + 67207204 = 33687^2 + 8198^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202021173 - 2⁵ = 1202021141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1202021173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202021113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601010586 + 601010587.

It is an arithmetic number, because the mean of its divisors is an integer number (601010587).

Almost surely, 2^1202021173 is an apocalyptic number.

It is an amenable number.

1202021173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202021173 is an equidigital number, since it uses as much as digits as its factorization.

1202021173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1202021173 is about 34670.1769969523. The cubic root of 1202021173 is about 1063.2548503136.

Adding to 1202021173 its reverse (3711202021), we get a palindrome (4913223194).

The spelling of 1202021173 in words is "one billion, two hundred two million, twenty-one thousand, one hundred seventy-three".