100201021173 has 18 divisors (see below), whose sum is σ = 159088675382. Its totient is φ = 60727890960.

The previous prime is 100201021171. The next prime is 100201021181. The reversal of 100201021173 is 371120102001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83586326769 + 16614694404 = 289113^2 + 128898^2 .

It is not a de Polignac number, because 100201021173 - 2¹ = 100201021171 is a prime.

It is a super-2 number, since 2×100201021173² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100201021171) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 46004890 + ... + 46007067.

Almost surely, 2^100201021173 is an apocalyptic number.

It is an amenable number.

100201021173 is a deficient number, since it is larger than the sum of its proper divisors (58887654209).

100201021173 is a wasteful number, since it uses less digits than its factorization.

100201021173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92011985 (or 92011971 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

Adding to 100201021173 its reverse (371120102001), we get a palindrome (471321123174).

The spelling of 100201021173 in words is "one hundred billion, two hundred one million, twenty-one thousand, one hundred seventy-three".