21011223331230 has 64 divisors (see below), whose sum is σ = 55116791076096. Its totient is φ = 5083853216000.

The previous prime is 21011223331213. The next prime is 21011223331289. The reversal of 21011223331230 is 3213332211012.

It is a self number, because there is not a number n which added to its sum of digits gives 21011223331230.

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, 60932076 + ... + 61275935.

It is an arithmetic number, because the mean of its divisors is an integer number (861199860564).

Almost surely, 2^{21011223331230} is an apocalyptic number.

21011223331230 is an abundant number, since it is smaller than the sum of its proper divisors (34105567744866).

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

21011223331230 is a wasteful number, since it uses less digits than its factorization.

21011223331230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122208553.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21011223331230 its reverse (3213332211012), we get a palindrome (24224555542242).

The spelling of 21011223331230 in words is "twenty-one trillion, eleven billion, two hundred twenty-three million, three hundred thirty-one thousand, two hundred thirty".