100021203173 has 2 divisors, whose sum is σ = 100021203174. Its totient is φ = 100021203172.

The previous prime is 100021203167. The next prime is 100021203223. The reversal of 100021203173 is 371302120001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50025137569 + 49996065604 = 223663^2 + 223598^2 .

It is a cyclic number.

It is not a de Polignac number, because 100021203173 - 2¹⁶ = 100021137637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100021253173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010601586 + 50010601587.

It is an arithmetic number, because the mean of its divisors is an integer number (50010601587).

Almost surely, 2^100021203173 is an apocalyptic number.

It is an amenable number.

100021203173 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021203173 is an equidigital number, since it uses as much as digits as its factorization.

100021203173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 100021203173 its reverse (371302120001), we get a palindrome (471323323174).

The spelling of 100021203173 in words is "one hundred billion, twenty-one million, two hundred three thousand, one hundred seventy-three".