320121100131 has 32 divisors (see below), whose sum is σ = 505646284800. Its totient is φ = 176284715040.

The previous prime is 320121100129. The next prime is 320121100141. The reversal of 320121100131 is 131001121023.

It is a happy number.

It is not a de Polignac number, because 320121100131 - 2¹ = 320121100129 is a prime.

It is a super-2 number, since 2×320121100131² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320121100131.

It is not an unprimeable number, because it can be changed into a prime (320121100111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 873151 + ... + 1184328.

It is an arithmetic number, because the mean of its divisors is an integer number (15801446400).

Almost surely, 2^320121100131 is an apocalyptic number.

320121100131 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

320121100131 is a deficient number, since it is larger than the sum of its proper divisors (185525184669).

320121100131 is a wasteful number, since it uses less digits than its factorization.

320121100131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057759.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 320121100131 its reverse (131001121023), we get a palindrome (451122221154).

The spelling of 320121100131 in words is "three hundred twenty billion, one hundred twenty-one million, one hundred thousand, one hundred thirty-one".