21020123012330 has 128 divisors (see below), whose sum is σ = 42445496814336. Its totient is φ = 7444211558400.

The previous prime is 21020123012309. The next prime is 21020123012341. The reversal of 21020123012330 is 3321032102012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 716246717 + ... + 716276063.

It is an arithmetic number, because the mean of its divisors is an integer number (331605443862).

Almost surely, 2^{21020123012330} is an apocalyptic number.

21020123012330 is an abundant number, since it is smaller than the sum of its proper divisors (21425373802006).

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

21020123012330 is a wasteful number, since it uses less digits than its factorization.

21020123012330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31672.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21020123012330 its reverse (3321032102012), we get a palindrome (24341155114342).

The spelling of 21020123012330 in words is "twenty-one trillion, twenty billion, one hundred twenty-three million, twelve thousand, three hundred thirty".