131220203011 has 16 divisors (see below), whose sum is σ = 136683790848. Its totient is φ = 125873020000.

The previous prime is 131220202951. The next prime is 131220203039. The reversal of 131220203011 is 110302022131.

It is a cyclic number.

It is not a de Polignac number, because 131220203011 - 2⁹ = 131220202499 is a prime.

It is a super-2 number, since 2×131220203011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131220207011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2391636 + ... + 2445886.

It is an arithmetic number, because the mean of its divisors is an integer number (8542736928).

Almost surely, 2^131220203011 is an apocalyptic number.

131220203011 is a deficient number, since it is larger than the sum of its proper divisors (5463587837).

131220203011 is an equidigital number, since it uses as much as digits as its factorization.

131220203011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55322.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 131220203011 its reverse (110302022131), we get a palindrome (241522225142).

The spelling of 131220203011 in words is "one hundred thirty-one billion, two hundred twenty million, two hundred three thousand, eleven".