21203102983 has 2 divisors, whose sum is σ = 21203102984. Its totient is φ = 21203102982.

The previous prime is 21203102939. The next prime is 21203103041. The reversal of 21203102983 is 38920130212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21203102983 is a prime.

It is a super-2 number, since 2×21203102983² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21203102923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601551491 + 10601551492.

It is an arithmetic number, because the mean of its divisors is an integer number (10601551492).

Almost surely, 2^21203102983 is an apocalyptic number.

21203102983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203102983 is an equidigital number, since it uses as much as digits as its factorization.

21203102983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 21203102983 in words is "twenty-one billion, two hundred three million, one hundred two thousand, nine hundred eighty-three".