21002102442223 has 8 divisors (see below), whose sum is σ = 25414308837792. Its totient is φ = 16942872558336.

The previous prime is 21002102442221. The next prime is 21002102442227. The reversal of 21002102442223 is 32224420120012.

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

It is a cyclic number.

It is not a de Polignac number, because 21002102442223 - 2¹ = 21002102442221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002102442221) 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, 88244127790 + ... + 88244128027.

It is an arithmetic number, because the mean of its divisors is an integer number (3176788604724).

Almost surely, 2^{21002102442223} is an apocalyptic number.

21002102442223 is a deficient number, since it is larger than the sum of its proper divisors (4412206395569).

21002102442223 is a wasteful number, since it uses less digits than its factorization.

21002102442223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176488255841.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21002102442223 its reverse (32224420120012), we get a palindrome (53226522562235).

The spelling of 21002102442223 in words is "twenty-one trillion, two billion, one hundred two million, four hundred forty-two thousand, two hundred twenty-three".