21030330031103 has 16 divisors (see below), whose sum is σ = 21495075840000. Its totient is φ = 20566311515232.

The previous prime is 21030330031097. The next prime is 21030330031129. The reversal of 21030330031103 is 30113003303012.

It is a cyclic number.

It is not a de Polignac number, because 21030330031103 - 2³² = 21026035063807 is a prime.

It is a super-2 number, since 2×21030330031103² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030330031153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306088448 + ... + 306157146.

It is an arithmetic number, because the mean of its divisors is an integer number (1343442240000).

Almost surely, 2^{21030330031103} is an apocalyptic number.

21030330031103 is a deficient number, since it is larger than the sum of its proper divisors (464745808897).

21030330031103 is a wasteful number, since it uses less digits than its factorization.

21030330031103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73894.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21030330031103 its reverse (30113003303012), we get a palindrome (51143333334115).

The spelling of 21030330031103 in words is "twenty-one trillion, thirty billion, three hundred thirty million, thirty-one thousand, one hundred three".