21232223320202 has 4 divisors (see below), whose sum is σ = 31848334980306. Its totient is φ = 10616111660100.

The previous prime is 21232223320163. The next prime is 21232223320207. The reversal of 21232223320202 is 20202332223212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18464887932241 + 2767335387961 = 4297079^2 + 1663531^2 .

It is not an unprimeable number, because it can be changed into a prime (21232223320207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5308055830049 + ... + 5308055830052.

Almost surely, 2^{21232223320202} is an apocalyptic number.

21232223320202 is a deficient number, since it is larger than the sum of its proper divisors (10616111660104).

21232223320202 is a wasteful number, since it uses less digits than its factorization.

21232223320202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10616111660103.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21232223320202 its reverse (20202332223212), we get a palindrome (41434555543414).

The spelling of 21232223320202 in words is "twenty-one trillion, two hundred thirty-two billion, two hundred twenty-three million, three hundred twenty thousand, two hundred two".