131211220223 has 4 divisors (see below), whose sum is σ = 131453755368. Its totient is φ = 130968685080.

The previous prime is 131211220213. The next prime is 131211220229. The reversal of 131211220223 is 322022112131.

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 131211220223 - 2¹⁶ = 131211154687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131211220195 and 131211220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211220229) 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, 121266761 + ... + 121267842.

It is an arithmetic number, because the mean of its divisors is an integer number (32863438842).

Almost surely, 2^131211220223 is an apocalyptic number.

131211220223 is a deficient number, since it is larger than the sum of its proper divisors (242535145).

131211220223 is an equidigital number, since it uses as much as digits as its factorization.

131211220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242535144.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131211220223 its reverse (322022112131), we get a palindrome (453233332354).

The spelling of 131211220223 in words is "one hundred thirty-one billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-three".