20042231013131 has 16 divisors (see below), whose sum is σ = 22028363562240. Its totient is φ = 18150277321440.

The previous prime is 20042231013083. The next prime is 20042231013157. The reversal of 20042231013131 is 13131013224002.

It is not a de Polignac number, because 20042231013131 - 2¹⁰ = 20042231012107 is a prime.

It is a super-2 number, since 2×20042231013131² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20042231013097 and 20042231013106.

It is not an unprimeable number, because it can be changed into a prime (20042231013031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13910300 + ... + 15283353.

It is an arithmetic number, because the mean of its divisors is an integer number (1376772722640).

Almost surely, 2^{20042231013131} is an apocalyptic number.

20042231013131 is a deficient number, since it is larger than the sum of its proper divisors (1986132549109).

20042231013131 is a wasteful number, since it uses less digits than its factorization.

20042231013131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29195266.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20042231013131 its reverse (13131013224002), we get a palindrome (33173244237133).

The spelling of 20042231013131 in words is "twenty trillion, forty-two billion, two hundred thirty-one million, thirteen thousand, one hundred thirty-one".