21220133211030 has 128 divisors (see below), whose sum is σ = 57758361292800. Its totient is φ = 4946284721664.

The previous prime is 21220133210987. The next prime is 21220133211041. The reversal of 21220133211030 is 3011233102212.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21220133210988 and 21220133211006.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 15936091 + ... + 17216249.

It is an arithmetic number, because the mean of its divisors is an integer number (451237197600).

Almost surely, 2^{21220133211030} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21220133211030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28879180646400).

21220133211030 is an abundant number, since it is smaller than the sum of its proper divisors (36538228081770).

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

21220133211030 is a wasteful number, since it uses less digits than its factorization.

21220133211030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282438.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21220133211030 its reverse (3011233102212), we get a palindrome (24231366313242).

The spelling of 21220133211030 in words is "twenty-one trillion, two hundred twenty billion, one hundred thirty-three million, two hundred eleven thousand, thirty".