1002100010 has 8 divisors (see below), whose sum is σ = 1803780036. Its totient is φ = 400840000.

The previous prime is 1002100007. The next prime is 1002100013. The reversal of 1002100010 is 100012001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1002100007) and next prime (1002100013).

It can be written as a sum of positive squares in 2 ways, for example, as 997991281 + 4108729 = 31591^2 + 2027^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1002099967 and 1002100003.

It is not an unprimeable number, because it can be changed into a prime (1002100013) 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, 50104991 + ... + 50105010.

Almost surely, 2^1002100010 is an apocalyptic number.

1002100010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1002100010 is a deficient number, since it is larger than the sum of its proper divisors (801680026).

1002100010 is a wasteful number, since it uses less digits than its factorization.

1002100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100210008.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1002100010 is about 31655.9632612878. The cubic root of 1002100010 is about 1000.6995138995.

Adding to 1002100010 its reverse (100012001), we get a palindrome (1102112011).

The spelling of 1002100010 in words is "one billion, two million, one hundred thousand, ten".