10100021205 has 16 divisors (see below), whose sum is σ = 16308293760. Its totient is φ = 5337258048.

The previous prime is 10100021201. The next prime is 10100021227. The reversal of 10100021205 is 50212000101.

It is not a de Polignac number, because 10100021205 - 2² = 10100021201 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100021201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3087057 + ... + 3090326.

It is an arithmetic number, because the mean of its divisors is an integer number (1019268360).

Almost surely, 2^10100021205 is an apocalyptic number.

10100021205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10100021205 is a deficient number, since it is larger than the sum of its proper divisors (6208272555).

10100021205 is a wasteful number, since it uses less digits than its factorization.

10100021205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6177500.

The product of its (nonzero) digits is 20, while the sum is 12.

Adding to 10100021205 its reverse (50212000101), we get a palindrome (60312021306).

The spelling of 10100021205 in words is "ten billion, one hundred million, twenty-one thousand, two hundred five".