21101020220202 has 32 divisors (see below), whose sum is σ = 45476388746880. Its totient is φ = 6488616248640.

The previous prime is 21101020220117. The next prime is 21101020220281. The reversal of 21101020220202 is 20202202010112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83317702 + ... + 83570577.

It is an arithmetic number, because the mean of its divisors is an integer number (1421137148340).

Almost surely, 2^{21101020220202} is an apocalyptic number.

21101020220202 is an abundant number, since it is smaller than the sum of its proper divisors (24375368526678).

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

21101020220202 is a wasteful number, since it uses less digits than its factorization.

21101020220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166889918.

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

Adding to 21101020220202 its reverse (20202202010112), we get a palindrome (41303222230314).

The spelling of 21101020220202 in words is "twenty-one trillion, one hundred one billion, twenty million, two hundred twenty thousand, two hundred two".