21120321110002 has 4 divisors (see below), whose sum is σ = 31680481665006. Its totient is φ = 10560160555000.

The previous prime is 21120321109991. The next prime is 21120321110047. The reversal of 21120321110002 is 20001112302112.

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., 11992846898761 + 9127474211241 = 3463069^2 + 3021171^2 .

It is a super-2 number, since 2×21120321110002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280080277499 + ... + 5280080277502.

Almost surely, 2^{21120321110002} is an apocalyptic number.

21120321110002 is a deficient number, since it is larger than the sum of its proper divisors (10560160555004).

21120321110002 is a wasteful number, since it uses less digits than its factorization.

21120321110002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560160555003.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21120321110002 its reverse (20001112302112), we get a palindrome (41121433412114).

The spelling of 21120321110002 in words is "twenty-one trillion, one hundred twenty billion, three hundred twenty-one million, one hundred ten thousand, two".