21123223130032 has 40 divisors (see below), whose sum is σ = 40979658004560. Its totient is φ = 10547833512960.

The previous prime is 21123223129913. The next prime is 21123223130033. The reversal of 21123223130032 is 23003132232112.

It is a super-2 number, since 2×21123223130032² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21123223129979 and 21123223130006.

It is not an unprimeable number, because it can be changed into a prime (21123223130033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56878644 + ... + 57248812.

It is an arithmetic number, because the mean of its divisors is an integer number (1024491450114).

Almost surely, 2^{21123223130032} is an apocalyptic number.

It is an amenable number.

21123223130032 is a deficient number, since it is larger than the sum of its proper divisors (19856434874528).

21123223130032 is a wasteful number, since it uses less digits than its factorization.

21123223130032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374821 (or 374815 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21123223130032 its reverse (23003132232112), we get a palindrome (44126355362144).

The spelling of 21123223130032 in words is "twenty-one trillion, one hundred twenty-three billion, two hundred twenty-three million, one hundred thirty thousand, thirty-two".