2131033213021 has 4 divisors (see below), whose sum is σ = 2145335449500. Its totient is φ = 2116730976544.

The previous prime is 2131033213019. The next prime is 2131033213031. The reversal of 2131033213021 is 1203123301312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 267573425625 + 1863459787396 = 517275^2 + 1365086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131033213021 - 2¹ = 2131033213019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131033212983 and 2131033213001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131033213031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7151118016 + ... + 7151118313.

It is an arithmetic number, because the mean of its divisors is an integer number (536333862375).

Almost surely, 2^{2131033213021} is an apocalyptic number.

It is an amenable number.

2131033213021 is a deficient number, since it is larger than the sum of its proper divisors (14302236479).

2131033213021 is a wasteful number, since it uses less digits than its factorization.

2131033213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14302236478.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 2131033213021 its reverse (1203123301312), we get a palindrome (3334156514333).

The spelling of 2131033213021 in words is "two trillion, one hundred thirty-one billion, thirty-three million, two hundred thirteen thousand, twenty-one".