100000021010 has 16 divisors (see below), whose sum is σ = 180669187800. Its totient is φ = 39851308416.

The previous prime is 100000021001. The next prime is 100000021021. The reversal of 100000021010 is 10120000001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 66165729529 + 33834291481 = 257227^2 + 183941^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 100000020985 and 100000021003.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18584675 + ... + 18590054.

Almost surely, 2^100000021010 is an apocalyptic number.

100000021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100000021010 is a deficient number, since it is larger than the sum of its proper divisors (80669166790).

100000021010 is a wasteful number, since it uses less digits than its factorization.

100000021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37175005.

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

Adding to 100000021010 its reverse (10120000001), we get a palindrome (110120021011).

The spelling of 100000021010 in words is "one hundred billion, twenty-one thousand, ten".