21203002554023 has 2 divisors, whose sum is σ = 21203002554024. Its totient is φ = 21203002554022.

The previous prime is 21203002553981. The next prime is 21203002554067. The reversal of 21203002554023 is 32045520030212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21203002554023 - 2⁸ = 21203002553767 is a prime.

It is a super-2 number, since 2×21203002554023² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21203002554073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601501277011 + 10601501277012.

It is an arithmetic number, because the mean of its divisors is an integer number (10601501277012).

Almost surely, 2^{21203002554023} is an apocalyptic number.

21203002554023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203002554023 is an equidigital number, since it uses as much as digits as its factorization.

21203002554023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 21203002554023 its reverse (32045520030212), we get a palindrome (53248522584235).

The spelling of 21203002554023 in words is "twenty-one trillion, two hundred three billion, two million, five hundred fifty-four thousand, twenty-three".