20001131210 has 16 divisors (see below), whose sum is σ = 38119803336. Its totient is φ = 7529837568.

The previous prime is 20001131197. The next prime is 20001131219. The reversal of 20001131210 is 1213110002.

It can be written as a sum of positive squares in 4 ways, for example, as 19989152689 + 11978521 = 141383^2 + 3461^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20001131191 and 20001131200.

It is not an unprimeable number, because it can be changed into a prime (20001131219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58826687 + ... + 58827026.

Almost surely, 2^20001131210 is an apocalyptic number.

20001131210 is a deficient number, since it is larger than the sum of its proper divisors (18118672126).

20001131210 is a wasteful number, since it uses less digits than its factorization.

20001131210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117653737.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20001131210 its reverse (1213110002), we get a palindrome (21214241212).

The spelling of 20001131210 in words is "twenty billion, one million, one hundred thirty-one thousand, two hundred ten".