2131000312221 has 96 divisors (see below), whose sum is σ = 3462489219072. Its totient is φ = 1251595255680.

The previous prime is 2131000312141. The next prime is 2131000312229. The reversal of 2131000312221 is 1222130001312.

2131000312221 is a `hidden beast` number, since 2 + 131 + 0 + 0 + 0 + 312 + 221 = 666.

It is not a de Polignac number, because 2131000312221 - 2¹⁰ = 2131000311197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2131000312194 and 2131000312203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131000312229) 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 95 ways as a sum of consecutive naturals, for example, 1497539916 + ... + 1497541338.

It is an arithmetic number, because the mean of its divisors is an integer number (36067596032).

Almost surely, 2^{2131000312221} is an apocalyptic number.

It is an amenable number.

2131000312221 is a deficient number, since it is larger than the sum of its proper divisors (1331488906851).

2131000312221 is a wasteful number, since it uses less digits than its factorization.

2131000312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823 (or 2820 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2131000312221 its reverse (1222130001312), we get a palindrome (3353130313533).

The spelling of 2131000312221 in words is "two trillion, one hundred thirty-one billion, three hundred twelve thousand, two hundred twenty-one".