100021010 has 16 divisors (see below), whose sum is σ = 184225536. Its totient is φ = 39077808.

The previous prime is 100021003. The next prime is 100021039. The reversal of 100021010 is 10120001.

It is a happy number.

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 = 100020985 and 100021003.

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, 115874 + ... + 116733.

It is an arithmetic number, because the mean of its divisors is an integer number (11514096).

Almost surely, 2^100021010 is an apocalyptic number.

100021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100021010 is a deficient number, since it is larger than the sum of its proper divisors (84204526).

100021010 is a wasteful number, since it uses less digits than its factorization.

100021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232657.

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

The square root of 100021010 is about 10001.0504448283. The cubic root of 100021010 is about 464.1913876788.

Adding to 100021010 its reverse (10120001), we get a palindrome (110141011).

The spelling of 100021010 in words is "one hundred million, twenty-one thousand, ten".