20031121230 has 32 divisors (see below), whose sum is σ = 48653910144. Its totient is φ = 5277274656.

The previous prime is 20031121223. The next prime is 20031121259. The reversal of 20031121230 is 3212113002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4019824 + ... + 4024803.

It is an arithmetic number, because the mean of its divisors is an integer number (1520434692).

Almost surely, 2^20031121230 is an apocalyptic number.

20031121230 is an abundant number, since it is smaller than the sum of its proper divisors (28622788914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20031121230 is a wasteful number, since it uses less digits than its factorization.

20031121230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044720.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20031121230 its reverse (3212113002), we get a palindrome (23243234232).

The spelling of 20031121230 in words is "twenty billion, thirty-one million, one hundred twenty-one thousand, two hundred thirty".