1002122197 has 4 divisors (see below), whose sum is σ = 1002971916. Its totient is φ = 1001272480.

The previous prime is 1002122179. The next prime is 1002122243. The reversal of 1002122197 is 7912212001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 827195121 + 174927076 = 28761^2 + 13226^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002122197 - 2¹¹ = 1002120149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002122497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423088 + ... + 425449.

It is an arithmetic number, because the mean of its divisors is an integer number (250742979).

Almost surely, 2^1002122197 is an apocalyptic number.

It is an amenable number.

1002122197 is a deficient number, since it is larger than the sum of its proper divisors (849719).

1002122197 is an equidigital number, since it uses as much as digits as its factorization.

1002122197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849718.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1002122197 is about 31656.3136988500. The cubic root of 1002122197 is about 1000.7068991758.

Adding to 1002122197 its reverse (7912212001), we get a palindrome (8914334198).

The spelling of 1002122197 in words is "one billion, two million, one hundred twenty-two thousand, one hundred ninety-seven".