21102120101003 has 2 divisors, whose sum is σ = 21102120101004. Its totient is φ = 21102120101002.

The previous prime is 21102120100993. The next prime is 21102120101017. The reversal of 21102120101003 is 30010102120112.

It is an a-pointer prime, because the next prime (21102120101017) can be obtained adding 21102120101003 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21102120101003 - 2³⁴ = 21084940231819 is a prime.

It is not a weakly prime, because it can be changed into another prime (21102120101033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551060050501 + 10551060050502.

It is an arithmetic number, because the mean of its divisors is an integer number (10551060050502).

Almost surely, 2^{21102120101003} is an apocalyptic number.

21102120101003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102120101003 is an equidigital number, since it uses as much as digits as its factorization.

21102120101003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21102120101003 its reverse (30010102120112), we get a palindrome (51112222221115).

The spelling of 21102120101003 in words is "twenty-one trillion, one hundred two billion, one hundred twenty million, one hundred one thousand, three".