21020230042103 has 16 divisors (see below), whose sum is σ = 21102386492160. Its totient is φ = 20938254629376.

The previous prime is 21020230042087. The next prime is 21020230042127. The reversal of 21020230042103 is 30124003202012.

It is a cyclic number.

It is not a de Polignac number, because 21020230042103 - 2⁴ = 21020230042087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020230041103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1358502575 + ... + 1358518047.

It is an arithmetic number, because the mean of its divisors is an integer number (1318899155760).

Almost surely, 2^{21020230042103} is an apocalyptic number.

21020230042103 is a deficient number, since it is larger than the sum of its proper divisors (82156450057).

21020230042103 is a wasteful number, since it uses less digits than its factorization.

21020230042103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20986.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21020230042103 its reverse (30124003202012), we get a palindrome (51144233244115).

The spelling of 21020230042103 in words is "twenty-one trillion, twenty billion, two hundred thirty million, forty-two thousand, one hundred three".