20231240220131 has 4 divisors (see below), whose sum is σ = 21296042337000. Its totient is φ = 19166438103264.

The previous prime is 20231240220071. The next prime is 20231240220137. The reversal of 20231240220131 is 13102204213202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20231240220131 - 2¹⁰ = 20231240219107 is a prime.

It is a super-2 number, since 2×20231240220131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20231240220097 and 20231240220106.

It is not an unprimeable number, because it can be changed into a prime (20231240220137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532401058406 + ... + 532401058443.

It is an arithmetic number, because the mean of its divisors is an integer number (5324010584250).

Almost surely, 2^{20231240220131} is an apocalyptic number.

20231240220131 is a deficient number, since it is larger than the sum of its proper divisors (1064802116869).

20231240220131 is a wasteful number, since it uses less digits than its factorization.

20231240220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064802116868.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20231240220131 its reverse (13102204213202), we get a palindrome (33333444433333).

The spelling of 20231240220131 in words is "twenty trillion, two hundred thirty-one billion, two hundred forty million, two hundred twenty thousand, one hundred thirty-one".