2131121202320 has 60 divisors (see below), whose sum is σ = 5446247576700. Its totient is φ = 774953160960.

The previous prime is 2131121202277. The next prime is 2131121202323. The reversal of 2131121202320 is 232021211312.

It can be written as a sum of positive squares in 2 ways, for example, as 1084772242576 + 1046348959744 = 1041524^2 + 1022912^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2131121202292 and 2131121202301.

It is not an unprimeable number, because it can be changed into a prime (2131121202323) 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 11 ways as a sum of consecutive naturals, for example, 110068895 + ... + 110088254.

It is an arithmetic number, because the mean of its divisors is an integer number (90770792945).

Almost surely, 2^{2131121202320} is an apocalyptic number.

2131121202320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131121202320 is an abundant number, since it is smaller than the sum of its proper divisors (3315126374380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131121202320 is a wasteful number, since it uses less digits than its factorization.

2131121202320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220157184 (or 220157167 counting only the distinct ones).

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

Adding to 2131121202320 its reverse (232021211312), we get a palindrome (2363142413632).

The spelling of 2131121202320 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-one million, two hundred two thousand, three hundred twenty".