2100030020321 has 2 divisors, whose sum is σ = 2100030020322. Its totient is φ = 2100030020320.

The previous prime is 2100030020303. The next prime is 2100030020383. The reversal of 2100030020321 is 1230200300012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1637276352721 + 462753667600 = 1279561^2 + 680260^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100030020321 - 2¹⁴ = 2100030003937 is a prime.

It is a super-3 number, since 3×2100030020321³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2100030020296 and 2100030020305.

It is not a weakly prime, because it can be changed into another prime (2100030020021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050015010160 + 1050015010161.

It is an arithmetic number, because the mean of its divisors is an integer number (1050015010161).

Almost surely, 2^{2100030020321} is an apocalyptic number.

It is an amenable number.

2100030020321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100030020321 is an equidigital number, since it uses as much as digits as its factorization.

2100030020321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 2100030020321 its reverse (1230200300012), we get a palindrome (3330230320333).

The spelling of 2100030020321 in words is "two trillion, one hundred billion, thirty million, twenty thousand, three hundred twenty-one".