1002021210 has 48 divisors (see below), whose sum is σ = 2612043720. Its totient is φ = 266509440.

The previous prime is 1002021179. The next prime is 1002021239. The reversal of 1002021210 is 121202001.

It can be written as a sum of positive squares in 4 ways, for example, as 339628041 + 662393169 = 18429^2 + 25737^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1002021192 and 1002021201.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 20700 + ... + 49320.

Almost surely, 2^1002021210 is an apocalyptic number.

1002021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1002021210 is an abundant number, since it is smaller than the sum of its proper divisors (1610022510).

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

1002021210 is a wasteful number, since it uses less digits than its factorization.

1002021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29023 (or 29020 counting only the distinct ones).

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

The square root of 1002021210 is about 31654.7186056044. The cubic root of 1002021210 is about 1000.6732832546.

Adding to 1002021210 its reverse (121202001), we get a palindrome (1123223211).

The spelling of 1002021210 in words is "one billion, two million, twenty-one thousand, two hundred ten".