21011020202202 has 32 divisors (see below), whose sum is σ = 42785828164800. Its totient is φ = 6876661828608.

The previous prime is 21011020202191. The next prime is 21011020202231. The reversal of 21011020202202 is 20220202011012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35504583 + ... + 36091514.

It is an arithmetic number, because the mean of its divisors is an integer number (1337057130150).

Almost surely, 2^{21011020202202} is an apocalyptic number.

21011020202202 is an abundant number, since it is smaller than the sum of its proper divisors (21774807962598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011020202202 is a wasteful number, since it uses less digits than its factorization.

21011020202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71596990.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21011020202202 its reverse (20220202011012), we get a palindrome (41231222213214).

The spelling of 21011020202202 in words is "twenty-one trillion, eleven billion, twenty million, two hundred two thousand, two hundred two".