21300103031020 has 48 divisors (see below), whose sum is σ = 49049431891488. Its totient is φ = 7705359912960.

The previous prime is 21300103030981. The next prime is 21300103031021. The reversal of 21300103031020 is 2013030100312.

It is a junction number, because it is equal to n+sod(n) for n = 21300103030985 and 21300103031003.

It is not an unprimeable number, because it can be changed into a prime (21300103031021) 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, 250783059 + ... + 250867978.

It is an arithmetic number, because the mean of its divisors is an integer number (1021863164406).

Almost surely, 2^{21300103031020} is an apocalyptic number.

21300103031020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300103031020 is an abundant number, since it is smaller than the sum of its proper divisors (27749328860468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21300103031020 is a wasteful number, since it uses less digits than its factorization.

21300103031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501651250 (or 501651248 counting only the distinct ones).

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

Adding to 21300103031020 its reverse (2013030100312), we get a palindrome (23313133131332).

The spelling of 21300103031020 in words is "twenty-one trillion, three hundred billion, one hundred three million, thirty-one thousand, twenty".