2131211203213 has 4 divisors (see below), whose sum is σ = 2139314668128. Its totient is φ = 2123107738300.

The previous prime is 2131211203211. The next prime is 2131211203307. The reversal of 2131211203213 is 3123021121312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2131211203213 - 2¹ = 2131211203211 is a prime.

It is a super-2 number, since 2×2131211203213² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131211203211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4051732063 + ... + 4051732588.

It is an arithmetic number, because the mean of its divisors is an integer number (534828667032).

Almost surely, 2^{2131211203213} is an apocalyptic number.

It is an amenable number.

2131211203213 is a deficient number, since it is larger than the sum of its proper divisors (8103464915).

2131211203213 is an equidigital number, since it uses as much as digits as its factorization.

2131211203213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8103464914.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2131211203213 its reverse (3123021121312), we get a palindrome (5254232324525).

The spelling of 2131211203213 in words is "two trillion, one hundred thirty-one billion, two hundred eleven million, two hundred three thousand, two hundred thirteen".