100122021205 has 4 divisors (see below), whose sum is σ = 120146425452. Its totient is φ = 80097616960.

The previous prime is 100122021199. The next prime is 100122021253. The reversal of 100122021205 is 502120221001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59495990724 + 40626030481 = 243918^2 + 201559^2 .

It is not a de Polignac number, because 100122021205 - 2¹⁵ = 100121988437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10012202116 + ... + 10012202125.

It is an arithmetic number, because the mean of its divisors is an integer number (30036606363).

Almost surely, 2^100122021205 is an apocalyptic number.

It is an amenable number.

100122021205 is a deficient number, since it is larger than the sum of its proper divisors (20024404247).

100122021205 is an equidigital number, since it uses as much as digits as its factorization.

100122021205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20024404246.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 100122021205 its reverse (502120221001), we get a palindrome (602242242206).

The spelling of 100122021205 in words is "one hundred billion, one hundred twenty-two million, twenty-one thousand, two hundred five".