2000030121 has 6 divisors (see below), whose sum is σ = 2888932410. Its totient is φ = 1333353408.

The previous prime is 2000030111. The next prime is 2000030141. The reversal of 2000030121 is 1210300002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1227801600 + 772228521 = 35040^2 + 27789^2 .

It is not a de Polignac number, because 2000030121 - 2⁹ = 2000029609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 222225569 = 2000030121 / (2 + 0 + 0 + 0 + 0 + 3 + 0 + 1 + 2 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2000030111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111112776 + ... + 111112793.

It is an arithmetic number, because the mean of its divisors is an integer number (481488735).

Almost surely, 2^2000030121 is an apocalyptic number.

It is an amenable number.

2000030121 is a deficient number, since it is larger than the sum of its proper divisors (888902289).

2000030121 is a wasteful number, since it uses less digits than its factorization.

2000030121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222225575 (or 222225572 counting only the distinct ones).

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

The square root of 2000030121 is about 44721.6963117456. The cubic root of 2000030121 is about 1259.9273748768.

Adding to 2000030121 its reverse (1210300002), we get a palindrome (3210330123).

The spelling of 2000030121 in words is "two billion, thirty thousand, one hundred twenty-one".