21010102202002 has 16 divisors (see below), whose sum is σ = 32301294867072. Its totient is φ = 10243281362080.

The previous prime is 21010102201969. The next prime is 21010102202009. The reversal of 21010102202002 is 20020220101012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21010102202009) 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, 69209878 + ... + 69512785.

It is an arithmetic number, because the mean of its divisors is an integer number (2018830929192).

Almost surely, 2^{21010102202002} is an apocalyptic number.

21010102202002 is a deficient number, since it is larger than the sum of its proper divisors (11291192665070).

21010102202002 is a wasteful number, since it uses less digits than its factorization.

21010102202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138724553.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21010102202002 its reverse (20020220101012), we get a palindrome (41030322303014).

The spelling of 21010102202002 in words is "twenty-one trillion, ten billion, one hundred two million, two hundred two thousand, two".