21213203100330 has 128 divisors (see below), whose sum is σ = 54022492325376. Its totient is φ = 5312646144000.

The previous prime is 21213203100311. The next prime is 21213203100361. The reversal of 21213203100330 is 3300130231212.

It is a super-2 number, since 2×21213203100330² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21213203100297 and 21213203100306.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1812933480 + ... + 1812945180.

It is an arithmetic number, because the mean of its divisors is an integer number (422050721292).

Almost surely, 2^{21213203100330} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21213203100330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27011246162688).

21213203100330 is an abundant number, since it is smaller than the sum of its proper divisors (32809289225046).

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

21213203100330 is a wasteful number, since it uses less digits than its factorization.

21213203100330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19072.

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

Adding to 21213203100330 its reverse (3300130231212), we get a palindrome (24513333331542).

The spelling of 21213203100330 in words is "twenty-one trillion, two hundred thirteen billion, two hundred three million, one hundred thousand, three hundred thirty".