21223123302 has 16 divisors (see below), whose sum is σ = 43909910640. Its totient is φ = 6830430432.

The previous prime is 21223123279. The next prime is 21223123303. The reversal of 21223123302 is 20332132212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223123303) 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, 60985813 + ... + 60986160.

It is an arithmetic number, because the mean of its divisors is an integer number (2744369415).

Almost surely, 2^21223123302 is an apocalyptic number.

21223123302 is an abundant number, since it is smaller than the sum of its proper divisors (22686787338).

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

21223123302 is a wasteful number, since it uses less digits than its factorization.

21223123302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121972007.

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

Adding to 21223123302 its reverse (20332132212), we get a palindrome (41555255514).

The spelling of 21223123302 in words is "twenty-one billion, two hundred twenty-three million, one hundred twenty-three thousand, three hundred two".