21110210121002 has 8 divisors (see below), whose sum is σ = 31665409443012. Its totient is φ = 10555073640000.

The previous prime is 21110210120977. The next prime is 21110210121017. The reversal of 21110210121002 is 20012101201112.

It can be written as a sum of positive squares in 2 ways, for example, as 20436466290241 + 673743830761 = 4520671^2 + 820819^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14861249 + ... + 16219652.

Almost surely, 2^{21110210121002} is an apocalyptic number.

21110210121002 is a deficient number, since it is larger than the sum of its proper divisors (10555199322010).

21110210121002 is a wasteful number, since it uses less digits than its factorization.

21110210121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31420504.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110210121002 its reverse (20012101201112), we get a palindrome (41122311322114).

The spelling of 21110210121002 in words is "twenty-one trillion, one hundred ten billion, two hundred ten million, one hundred twenty-one thousand, two".