21003012313030 has 32 divisors (see below), whose sum is σ = 41242471764480. Its totient is φ = 7637423274720.

The previous prime is 21003012312937. The next prime is 21003012313079. The reversal of 21003012313030 is 3031321030012.

It is a super-2 number, since 2×21003012313030² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003012312989 and 21003012313007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38599317 + ... + 39139663.

It is an arithmetic number, because the mean of its divisors is an integer number (1288827242640).

Almost surely, 2^{21003012313030} is an apocalyptic number.

21003012313030 is a deficient number, since it is larger than the sum of its proper divisors (20239459451450).

21003012313030 is a wasteful number, since it uses less digits than its factorization.

21003012313030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893724.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21003012313030 its reverse (3031321030012), we get a palindrome (24034333343042).

The spelling of 21003012313030 in words is "twenty-one trillion, three billion, twelve million, three hundred thirteen thousand, thirty".