21011020332103 has 2 divisors, whose sum is σ = 21011020332104. Its totient is φ = 21011020332102.

The previous prime is 21011020332067. The next prime is 21011020332119. The reversal of 21011020332103 is 30123302011012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21011020332103 - 2¹³ = 21011020323911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011020333103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505510166051 + 10505510166052.

It is an arithmetic number, because the mean of its divisors is an integer number (10505510166052).

Almost surely, 2^{21011020332103} is an apocalyptic number.

21011020332103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011020332103 is an equidigital number, since it uses as much as digits as its factorization.

21011020332103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21011020332103 its reverse (30123302011012), we get a palindrome (51134322343115).

The spelling of 21011020332103 in words is "twenty-one trillion, eleven billion, twenty million, three hundred thirty-two thousand, one hundred three".