131220111301 has 4 divisors (see below), whose sum is σ = 131251129504. Its totient is φ = 131189093100.

The previous prime is 131220111287. The next prime is 131220111307. The reversal of 131220111301 is 103111022131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131220111301 - 2¹¹ = 131220109253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220111307) 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, 15502755 + ... + 15511216.

It is an arithmetic number, because the mean of its divisors is an integer number (32812782376).

Almost surely, 2^131220111301 is an apocalyptic number.

It is an amenable number.

131220111301 is a deficient number, since it is larger than the sum of its proper divisors (31018203).

131220111301 is an equidigital number, since it uses as much as digits as its factorization.

131220111301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31018202.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 131220111301 its reverse (103111022131), we get a palindrome (234331133432).

The spelling of 131220111301 in words is "one hundred thirty-one billion, two hundred twenty million, one hundred eleven thousand, three hundred one".