21121001130323 has 2 divisors, whose sum is σ = 21121001130324. Its totient is φ = 21121001130322.

The previous prime is 21121001130293. The next prime is 21121001130343. The reversal of 21121001130323 is 32303110012112.

It is a happy number.

It is an a-pointer prime, because the next prime (21121001130343) can be obtained adding 21121001130323 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21121001130323 - 2⁶ = 21121001130259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21121001130295 and 21121001130304.

It is not a weakly prime, because it can be changed into another prime (21121001130343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560500565161 + 10560500565162.

It is an arithmetic number, because the mean of its divisors is an integer number (10560500565162).

Almost surely, 2^{21121001130323} is an apocalyptic number.

21121001130323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121001130323 is an equidigital number, since it uses as much as digits as its factorization.

21121001130323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21121001130323 its reverse (32303110012112), we get a palindrome (53424111142435).

It can be divided in two parts, 2112100 and 1130323, that added together give a palindrome (3242423).

The spelling of 21121001130323 in words is "twenty-one trillion, one hundred twenty-one billion, one million, one hundred thirty thousand, three hundred twenty-three".