21203032202123 has 2 divisors, whose sum is σ = 21203032202124. Its totient is φ = 21203032202122.

The previous prime is 21203032202119. The next prime is 21203032202167. The reversal of 21203032202123 is 32120223030212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21203032202123 - 2² = 21203032202119 is a prime.

It is not a weakly prime, because it can be changed into another prime (21203032202323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601516101061 + 10601516101062.

It is an arithmetic number, because the mean of its divisors is an integer number (10601516101062).

Almost surely, 2^{21203032202123} is an apocalyptic number.

21203032202123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203032202123 is an equidigital number, since it uses as much as digits as its factorization.

21203032202123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21203032202123 its reverse (32120223030212), we get a palindrome (53323255232335).

The spelling of 21203032202123 in words is "twenty-one trillion, two hundred three billion, thirty-two million, two hundred two thousand, one hundred twenty-three".