1021100002 has 24 divisors (see below), whose sum is σ = 1752217236. Its totient is φ = 443551488.

The previous prime is 1021099999. The next prime is 1021100009. The reversal of 1021100002 is 2000011201.

It can be written as a sum of positive squares in 6 ways, for example, as 372837481 + 648262521 = 19309^2 + 25461^2 .

It is not an unprimeable number, because it can be changed into a prime (1021100009) 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, 60433 + ... + 75460.

Almost surely, 2^1021100002 is an apocalyptic number.

1021100002 is a deficient number, since it is larger than the sum of its proper divisors (731117234).

1021100002 is a wasteful number, since it uses less digits than its factorization.

1021100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135942 (or 135925 counting only the distinct ones).

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

The square root of 1021100002 is about 31954.6554041817. The cubic root of 1021100002 is about 1006.9844380526.

Adding to 1021100002 its reverse (2000011201), we get a palindrome (3021111203).

The spelling of 1021100002 in words is "one billion, twenty-one million, one hundred thousand, two".