21022210010002 has 4 divisors (see below), whose sum is σ = 31533315015006. Its totient is φ = 10511105005000.

The previous prime is 21022210009961. The next prime is 21022210010003. The reversal of 21022210010002 is 20001001222012.

It is a happy number.

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., 19451195943201 + 1571014066801 = 4410351^2 + 1253401^2 .

It is not an unprimeable number, because it can be changed into a prime (21022210010003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255552502499 + ... + 5255552502502.

Almost surely, 2^{21022210010002} is an apocalyptic number.

21022210010002 is a deficient number, since it is larger than the sum of its proper divisors (10511105005004).

21022210010002 is a wasteful number, since it uses less digits than its factorization.

21022210010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511105005003.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21022210010002 its reverse (20001001222012), we get a palindrome (41023211232014).

The spelling of 21022210010002 in words is "twenty-one trillion, twenty-two billion, two hundred ten million, ten thousand, two".