2103131022021 has 12 divisors (see below), whose sum is σ = 3037870425772. Its totient is φ = 1402080653376.

The previous prime is 2103131022019. The next prime is 2103131022133. The reversal of 2103131022021 is 1202201313012.

2103131022021 is a `hidden beast` number, since 210 + 313 + 102 + 20 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 217216584225 + 1885914437796 = 466065^2 + 1373286^2 .

It is not a de Polignac number, because 2103131022021 - 2¹ = 2103131022019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2103131021985 and 2103131022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103131022011) 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 11 ways as a sum of consecutive naturals, for example, 2096385 + ... + 2932761.

Almost surely, 2^{2103131022021} is an apocalyptic number.

It is an amenable number.

2103131022021 is a deficient number, since it is larger than the sum of its proper divisors (934739403751).

2103131022021 is a wasteful number, since it uses less digits than its factorization.

2103131022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115780 (or 1115777 counting only the distinct ones).

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

Adding to 2103131022021 its reverse (1202201313012), we get a palindrome (3305332335033).

The spelling of 2103131022021 in words is "two trillion, one hundred three billion, one hundred thirty-one million, twenty-two thousand, twenty-one".