21302003123031 has 16 divisors (see below), whose sum is σ = 29146761463680. Its totient is φ = 13833145491360.

The previous prime is 21302003122999. The next prime is 21302003123039. The reversal of 21302003123031 is 13032130020312.

It is not a de Polignac number, because 21302003123031 - 2⁵ = 21302003122999 is a prime.

It is a super-2 number, since 2×21302003123031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21302003122989 and 21302003123007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302003123039) 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, 481901865 + ... + 481946066.

It is an arithmetic number, because the mean of its divisors is an integer number (1821672591480).

Almost surely, 2^{21302003123031} is an apocalyptic number.

21302003123031 is a deficient number, since it is larger than the sum of its proper divisors (7844758340649).

21302003123031 is a wasteful number, since it uses less digits than its factorization.

21302003123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963848126.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21302003123031 its reverse (13032130020312), we get a palindrome (34334133143343).

The spelling of 21302003123031 in words is "twenty-one trillion, three hundred two billion, three million, one hundred twenty-three thousand, thirty-one".