2131223220131 has 8 divisors (see below), whose sum is σ = 2164958718144. Its totient is φ = 2097544375080.

The previous prime is 2131223220067. The next prime is 2131223220149. The reversal of 2131223220131 is 1310223221312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131223220131 - 2⁶ = 2131223220067 is a prime.

It is a super-2 number, since 2×2131223220131² (a number of 25 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 = 2131223220097 and 2131223220106.

It is not an unprimeable number, because it can be changed into a prime (2131223220031) 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 7 ways as a sum of consecutive naturals, for example, 14087405 + ... + 14237886.

It is an arithmetic number, because the mean of its divisors is an integer number (270619839768).

Almost surely, 2^{2131223220131} is an apocalyptic number.

2131223220131 is a deficient number, since it is larger than the sum of its proper divisors (33735498013).

2131223220131 is a wasteful number, since it uses less digits than its factorization.

2131223220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28326481.

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

Adding to 2131223220131 its reverse (1310223221312), we get a palindrome (3441446441443).

The spelling of 2131223220131 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-three million, two hundred twenty thousand, one hundred thirty-one".