100121573 has 4 divisors (see below), whose sum is σ = 101531808. Its totient is φ = 98711340.

The previous prime is 100121563. The next prime is 100121579. The reversal of 100121573 is 375121001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100121573 - 2¹⁴ = 100105189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705011 + ... + 705152.

It is an arithmetic number, because the mean of its divisors is an integer number (25382952).

Almost surely, 2^100121573 is an apocalyptic number.

It is an amenable number.

100121573 is a deficient number, since it is larger than the sum of its proper divisors (1410235).

100121573 is an equidigital number, since it uses as much as digits as its factorization.

100121573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410234.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 100121573 is about 10006.0768036229. The cubic root of 100121573 is about 464.3469044806.

Adding to 100121573 its reverse (375121001), we get a palindrome (475242574).

The spelling of 100121573 in words is "one hundred million, one hundred twenty-one thousand, five hundred seventy-three".