20401210131 has 16 divisors (see below), whose sum is σ = 27884411520. Its totient is φ = 13259868480.

The previous prime is 20401210127. The next prime is 20401210171. The reversal of 20401210131 is 13101210402.

It is not a de Polignac number, because 20401210131 - 2² = 20401210127 is a prime.

It is a super-2 number, since 2×20401210131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20401210131.

It is not an unprimeable number, because it can be changed into a prime (20401210171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122616 + ... + 236298.

It is an arithmetic number, because the mean of its divisors is an integer number (1742775720).

Almost surely, 2^20401210131 is an apocalyptic number.

20401210131 is a deficient number, since it is larger than the sum of its proper divisors (7483201389).

20401210131 is a wasteful number, since it uses less digits than its factorization.

20401210131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115186.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20401210131 its reverse (13101210402), we get a palindrome (33502420533).

The spelling of 20401210131 in words is "twenty billion, four hundred one million, two hundred ten thousand, one hundred thirty-one".