200000003121 has 10 divisors (see below), whose sum is σ = 298765436882. Its totient is φ = 133333335360.

The previous prime is 200000003113. The next prime is 200000003131. The reversal of 200000003121 is 121300000002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 187402410000 + 12597593121 = 432900^2 + 112239^2 .

It is not a de Polignac number, because 200000003121 - 2³ = 200000003113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200000003131) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1234567840 + ... + 1234568001.

Almost surely, 2^200000003121 is an apocalyptic number.

It is an amenable number.

200000003121 is a deficient number, since it is larger than the sum of its proper divisors (98765433761).

200000003121 is an equidigital number, since it uses as much as digits as its factorization.

200000003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469135853 (or 2469135844 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 200000003121 its reverse (121300000002), we get a palindrome (321300003123).

The spelling of 200000003121 in words is "two hundred billion, three thousand, one hundred twenty-one".