1021210002 has 24 divisors (see below), whose sum is σ = 2288920140. Its totient is φ = 328665120.

The previous prime is 1021209997. The next prime is 1021210007. The reversal of 1021210002 is 2000121201.

It is an interprime number because it is at equal distance from previous prime (1021209997) and next prime (1021210007).

It can be written as a sum of positive squares in 2 ways, for example, as 940587561 + 80622441 = 30669^2 + 8979^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1021210007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 977649 + ... + 978692.

Almost surely, 2^1021210002 is an apocalyptic number.

1021210002 is an abundant number, since it is smaller than the sum of its proper divisors (1267710138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021210002 is a wasteful number, since it uses less digits than its factorization.

1021210002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956378 (or 1956375 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1021210002 is about 31956.3765467864. The cubic root of 1021210002 is about 1007.0205965453.

Adding to 1021210002 its reverse (2000121201), we get a palindrome (3021331203).

The spelling of 1021210002 in words is "one billion, twenty-one million, two hundred ten thousand, two".