21103310203139 has 2 divisors, whose sum is σ = 21103310203140. Its totient is φ = 21103310203138.

The previous prime is 21103310203121. The next prime is 21103310203229. The reversal of 21103310203139 is 93130201330112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103310203139 is a prime.

It is not a weakly prime, because it can be changed into another prime (21103310203039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551655101569 + 10551655101570.

It is an arithmetic number, because the mean of its divisors is an integer number (10551655101570).

Almost surely, 2^{21103310203139} is an apocalyptic number.

21103310203139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103310203139 is an equidigital number, since it uses as much as digits as its factorization.

21103310203139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The spelling of 21103310203139 in words is "twenty-one trillion, one hundred three billion, three hundred ten million, two hundred three thousand, one hundred thirty-nine".