21111233330 has 128 divisors (see below), whose sum is σ = 44534956032. Its totient is φ = 7128000000.

The previous prime is 21111233323. The next prime is 21111233333. The reversal of 21111233330 is 3333211112.

It is not an unprimeable number, because it can be changed into a prime (21111233333) by changing a digit.

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, 28110455 + ... + 28111205.

It is an arithmetic number, because the mean of its divisors is an integer number (347929344).

Almost surely, 2^21111233330 is an apocalyptic number.

21111233330 is an abundant number, since it is smaller than the sum of its proper divisors (23423722702).

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

21111233330 is a wasteful number, since it uses less digits than its factorization.

21111233330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21111233330 its reverse (3333211112), we get a palindrome (24444444442).

It can be divided in two parts, 211112 and 33330, that added together give a palindrome (244442).

The spelling of 21111233330 in words is "twenty-one billion, one hundred eleven million, two hundred thirty-three thousand, three hundred thirty".