21300123031 has 8 divisors (see below), whose sum is σ = 23237729424. Its totient is φ = 19362721920.

The previous prime is 21300123023. The next prime is 21300123073. The reversal of 21300123031 is 13032100312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21300123031 - 2³ = 21300123023 is a prime.

It is a super-2 number, since 2×21300123031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21300122996 and 21300123014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300123001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235231 + ... + 312943.

It is an arithmetic number, because the mean of its divisors is an integer number (2904716178).

Almost surely, 2^21300123031 is an apocalyptic number.

21300123031 is a deficient number, since it is larger than the sum of its proper divisors (1937606393).

21300123031 is a wasteful number, since it uses less digits than its factorization.

21300123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102641.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21300123031 its reverse (13032100312), we get a palindrome (34332223343).

The spelling of 21300123031 in words is "twenty-one billion, three hundred million, one hundred twenty-three thousand, thirty-one".