21312003213030 has 64 divisors (see below), whose sum is σ = 51801044520960. Its totient is φ = 5610743389056.

The previous prime is 21312003213029. The next prime is 21312003213041. The reversal of 21312003213030 is 3031230021312.

It is a junction number, because it is equal to n+sod(n) for n = 21312003212988 and 21312003213006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25596259 + ... + 26415761.

It is an arithmetic number, because the mean of its divisors is an integer number (809391320640).

Almost surely, 2^{21312003213030} is an apocalyptic number.

21312003213030 is an abundant number, since it is smaller than the sum of its proper divisors (30489041307930).

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

21312003213030 is a wasteful number, since it uses less digits than its factorization.

21312003213030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830565.

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

Adding to 21312003213030 its reverse (3031230021312), we get a palindrome (24343233234342).

The spelling of 21312003213030 in words is "twenty-one trillion, three hundred twelve billion, three million, two hundred thirteen thousand, thirty".