21010122110002 has 4 divisors (see below), whose sum is σ = 31515183165006. Its totient is φ = 10505061055000.

The previous prime is 21010122109993. The next prime is 21010122110099. The reversal of 21010122110002 is 20001122101012.

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., 20571839713161 + 438282396841 = 4535619^2 + 662029^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252530527499 + ... + 5252530527502.

Almost surely, 2^{21010122110002} is an apocalyptic number.

21010122110002 is a deficient number, since it is larger than the sum of its proper divisors (10505061055004).

21010122110002 is a wasteful number, since it uses less digits than its factorization.

21010122110002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505061055003.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010122110002 its reverse (20001122101012), we get a palindrome (41011244211014).

The spelling of 21010122110002 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, one hundred ten thousand, two".