220311210131 has 4 divisors (see below), whose sum is σ = 231906537000. Its totient is φ = 208715883264.

The previous prime is 220311210127. The next prime is 220311210199. The reversal of 220311210131 is 131012113022.

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 220311210131 - 2² = 220311210127 is a prime.

It is a super-2 number, since 2×220311210131² (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 (220311210631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5797663406 + ... + 5797663443.

It is an arithmetic number, because the mean of its divisors is an integer number (57976634250).

Almost surely, 2^220311210131 is an apocalyptic number.

220311210131 is a deficient number, since it is larger than the sum of its proper divisors (11595326869).

220311210131 is a wasteful number, since it uses less digits than its factorization.

220311210131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11595326868.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 220311210131 its reverse (131012113022), we get a palindrome (351323323153).

The spelling of 220311210131 in words is "two hundred twenty billion, three hundred eleven million, two hundred ten thousand, one hundred thirty-one".