2103204020381 has 2 divisors, whose sum is σ = 2103204020382. Its totient is φ = 2103204020380.

The previous prime is 2103204020377. The next prime is 2103204020441. The reversal of 2103204020381 is 1830204023012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2082451024900 + 20752995481 = 1443070^2 + 144059^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103204020381 - 2² = 2103204020377 is a prime.

It is a super-2 number, since 2×2103204020381² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2103204020381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103204020581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051602010190 + 1051602010191.

It is an arithmetic number, because the mean of its divisors is an integer number (1051602010191).

Almost surely, 2^{2103204020381} is an apocalyptic number.

It is an amenable number.

2103204020381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103204020381 is an equidigital number, since it uses as much as digits as its factorization.

2103204020381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 2103204020381 its reverse (1830204023012), we get a palindrome (3933408043393).

The spelling of 2103204020381 in words is "two trillion, one hundred three billion, two hundred four million, twenty thousand, three hundred eighty-one".