20001202131 has 16 divisors (see below), whose sum is σ = 28095488640. Its totient is φ = 12621706560.

The previous prime is 20001202127. The next prime is 20001202141. The reversal of 20001202131 is 13120210002.

It is not a de Polignac number, because 20001202131 - 2² = 20001202127 is a prime.

It is a super-2 number, since 2×20001202131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20001202141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79065 + ... + 215066.

It is an arithmetic number, because the mean of its divisors is an integer number (1755968040).

Almost surely, 2^20001202131 is an apocalyptic number.

20001202131 is a deficient number, since it is larger than the sum of its proper divisors (8094286509).

20001202131 is a wasteful number, since it uses less digits than its factorization.

20001202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295346.

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

Adding to 20001202131 its reverse (13120210002), we get a palindrome (33121412133).

The spelling of 20001202131 in words is "twenty billion, one million, two hundred two thousand, one hundred thirty-one".