21223202052 has 24 divisors (see below), whose sum is σ = 53330097856. Its totient is φ = 6530215968.

The previous prime is 21223201997. The next prime is 21223202053. The reversal of 21223202052 is 25020232212.

It is not an unprimeable number, because it can be changed into a prime (21223202053) 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, 68022928 + ... + 68023239.

Almost surely, 2^21223202052 is an apocalyptic number.

It is an amenable number.

21223202052 is an abundant number, since it is smaller than the sum of its proper divisors (32106895804).

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

21223202052 is a wasteful number, since it uses less digits than its factorization.

21223202052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136046187 (or 136046185 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 21223202052 its reverse (25020232212), we get a palindrome (46243434264).

The spelling of 21223202052 in words is "twenty-one billion, two hundred twenty-three million, two hundred two thousand, fifty-two".