1210002001 has 8 divisors (see below), whose sum is σ = 1303684200. Its totient is φ = 1116406272.

The previous prime is 1210001987. The next prime is 1210002019. The reversal of 1210002001 is 1002000121.

It can be written as a sum of positive squares in 4 ways, for example, as 180875601 + 1029126400 = 13449^2 + 32080^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210002001 - 2¹⁹ = 1209477713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1210002901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9075 + ... + 50023.

It is an arithmetic number, because the mean of its divisors is an integer number (162960525).

Almost surely, 2^1210002001 is an apocalyptic number.

It is an amenable number.

1210002001 is a deficient number, since it is larger than the sum of its proper divisors (93682199).

1210002001 is a wasteful number, since it uses less digits than its factorization.

1210002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43235.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1210002001 is about 34785.0830241930. The cubic root of 1210002001 is about 1065.6028241685.

Adding to 1210002001 its reverse (1002000121), we get a palindrome (2212002122).

The spelling of 1210002001 in words is "one billion, two hundred ten million, two thousand, one".