21123323022 has 8 divisors (see below), whose sum is σ = 42246646056. Its totient is φ = 7041107672.

The previous prime is 21123323003. The next prime is 21123323029. The reversal of 21123323022 is 22032332112.

It is a happy number.

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

21123323022 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21123323022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123323029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760276913 + ... + 1760276924.

It is an arithmetic number, because the mean of its divisors is an integer number (5280830757).

Almost surely, 2^21123323022 is an apocalyptic number.

21123323022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21123323022 is a wasteful number, since it uses less digits than its factorization.

21123323022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3520553842.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21123323022 its reverse (22032332112), we get a palindrome (43155655134).

The spelling of 21123323022 in words is "twenty-one billion, one hundred twenty-three million, three hundred twenty-three thousand, twenty-two".