21003123032140 has 48 divisors (see below), whose sum is σ = 46709321524992. Its totient is φ = 7905659611136.

The previous prime is 21003123032039. The next prime is 21003123032207. The reversal of 21003123032140 is 4123032130012.

It is a super-2 number, since 2×21003123032140² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3536572 + ... + 7383331.

It is an arithmetic number, because the mean of its divisors is an integer number (973110865104).

Almost surely, 2^{21003123032140} is an apocalyptic number.

21003123032140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003123032140 is an abundant number, since it is smaller than the sum of its proper divisors (25706198492852).

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

21003123032140 is a wasteful number, since it uses less digits than its factorization.

21003123032140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10925586 (or 10925584 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21003123032140 its reverse (4123032130012), we get a palindrome (25126155162152).

The spelling of 21003123032140 in words is "twenty-one trillion, three billion, one hundred twenty-three million, thirty-two thousand, one hundred forty".