200121093 has 12 divisors (see below), whose sum is σ = 306067788. Its totient is φ = 125566080.

The previous prime is 200121073. The next prime is 200121107. The reversal of 200121093 is 390121002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 87272964 + 112848129 = 9342^2 + 10623^2 .

It is not a de Polignac number, because 200121093 - 2¹⁰ = 200120069 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 (200121013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 653838 + ... + 654143.

It is an arithmetic number, because the mean of its divisors is an integer number (25505649).

Almost surely, 2^200121093 is an apocalyptic number.

It is an amenable number.

200121093 is a deficient number, since it is larger than the sum of its proper divisors (105946695).

200121093 is a wasteful number, since it uses less digits than its factorization.

200121093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308004 (or 1308001 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 200121093 is about 14146.4162599579. The cubic root of 200121093 is about 584.9215498570.

Adding to 200121093 its reverse (390121002), we get a palindrome (590242095).

The spelling of 200121093 in words is "two hundred million, one hundred twenty-one thousand, ninety-three".