21121023420583 has 2 divisors, whose sum is σ = 21121023420584. Its totient is φ = 21121023420582.

The previous prime is 21121023420487. The next prime is 21121023420593. The reversal of 21121023420583 is 38502432012112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21121023420583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21121023420593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560511710291 + 10560511710292.

It is an arithmetic number, because the mean of its divisors is an integer number (10560511710292).

Almost surely, 2^{21121023420583} is an apocalyptic number.

21121023420583 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121023420583 is an equidigital number, since it uses as much as digits as its factorization.

21121023420583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 21121023420583 its reverse (38502432012112), we get a palindrome (59623455432695).

The spelling of 21121023420583 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-three million, four hundred twenty thousand, five hundred eighty-three".