21010220101202 has 12 divisors (see below), whose sum is σ = 33261331823406. Its totient is φ = 9952209521280.

The previous prime is 21010220101177. The next prime is 21010220101219. The reversal of 21010220101202 is 20210102201012.

It can be written as a sum of positive squares in only one way, i.e., 14174238587161 + 6835981514041 = 3764869^2 + 2614571^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14550013199 + ... + 14550014642.

Almost surely, 2^{21010220101202} is an apocalyptic number.

21010220101202 is a deficient number, since it is larger than the sum of its proper divisors (12251111722204).

21010220101202 is a wasteful number, since it uses less digits than its factorization.

21010220101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29100027881 (or 29100027862 counting only the distinct ones).

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

Adding to 21010220101202 its reverse (20210102201012), we get a palindrome (41220322302214).

The spelling of 21010220101202 in words is "twenty-one trillion, ten billion, two hundred twenty million, one hundred one thousand, two hundred two".