2000121231 has 16 divisors (see below), whose sum is σ = 2689568640. Its totient is φ = 1322062560.

The previous prime is 2000121223. The next prime is 2000121251. The reversal of 2000121231 is 1321210002.

It is not a de Polignac number, because 2000121231 - 2³ = 2000121223 is a prime.

It is a super-2 number, since 2×2000121231² = 8000969877393910722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000121251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880365 + ... + 882633.

It is an arithmetic number, because the mean of its divisors is an integer number (168098040).

Almost surely, 2^2000121231 is an apocalyptic number.

2000121231 is a deficient number, since it is larger than the sum of its proper divisors (689447409).

2000121231 is a wasteful number, since it uses less digits than its factorization.

2000121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4646.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2000121231 is about 44722.7149332417. The cubic root of 2000121231 is about 1259.9465062953.

Adding to 2000121231 its reverse (1321210002), we get a palindrome (3321331233).

The spelling of 2000121231 in words is "two billion, one hundred twenty-one thousand, two hundred thirty-one".