21123010022 has 8 divisors (see below), whose sum is σ = 31727161296. Its totient is φ = 10547289592.

The previous prime is 21123010019. The next prime is 21123010037. The reversal of 21123010022 is 22001032112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21123009979 and 21123010006.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7105853 + ... + 7108824.

It is an arithmetic number, because the mean of its divisors is an integer number (3965895162).

Almost surely, 2^21123010022 is an apocalyptic number.

21123010022 is a deficient number, since it is larger than the sum of its proper divisors (10604151274).

21123010022 is a wasteful number, since it uses less digits than its factorization.

21123010022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14215422.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21123010022 its reverse (22001032112), we get a palindrome (43124042134).

The spelling of 21123010022 in words is "twenty-one billion, one hundred twenty-three million, ten thousand, twenty-two".