21012110202002 has 4 divisors (see below), whose sum is σ = 31518165303006. Its totient is φ = 10506055101000.

The previous prime is 21012110201987. The next prime is 21012110202029. The reversal of 21012110202002 is 20020201121012.

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., 20927614758241 + 84495443761 = 4574671^2 + 290681^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5253027550499 + ... + 5253027550502.

Almost surely, 2^{21012110202002} is an apocalyptic number.

21012110202002 is a deficient number, since it is larger than the sum of its proper divisors (10506055101004).

21012110202002 is a wasteful number, since it uses less digits than its factorization.

21012110202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506055101003.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012110202002 its reverse (20020201121012), we get a palindrome (41032311323014).

The spelling of 21012110202002 in words is "twenty-one trillion, twelve billion, one hundred ten million, two hundred two thousand, two".