20031121210 has 16 divisors (see below), whose sum is σ = 36083628576. Its totient is φ = 8006312848.

The previous prime is 20031121207. The next prime is 20031121219. The reversal of 20031121210 is 1212113002.

It is not an unprimeable number, because it can be changed into a prime (20031121219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 753232 + ... + 779371.

It is an arithmetic number, because the mean of its divisors is an integer number (2255226786).

Almost surely, 2^20031121210 is an apocalyptic number.

20031121210 is a deficient number, since it is larger than the sum of its proper divisors (16052507366).

20031121210 is a wasteful number, since it uses less digits than its factorization.

20031121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533917.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20031121210 its reverse (1212113002), we get a palindrome (21243234212).

The spelling of 20031121210 in words is "twenty billion, thirty-one million, one hundred twenty-one thousand, two hundred ten".