21202011222102 has 48 divisors (see below), whose sum is σ = 47935406638080. Its totient is φ = 6760001649456.

The previous prime is 21202011222097. The next prime is 21202011222269. The reversal of 21202011222102 is 20122211020212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87036549 + ... + 87279807.

It is an arithmetic number, because the mean of its divisors is an integer number (998654304960).

Almost surely, 2^{21202011222102} is an apocalyptic number.

21202011222102 is an abundant number, since it is smaller than the sum of its proper divisors (26733395415978).

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

21202011222102 is a wasteful number, since it uses less digits than its factorization.

21202011222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453817 (or 453814 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21202011222102 its reverse (20122211020212), we get a palindrome (41324222242314).

The spelling of 21202011222102 in words is "twenty-one trillion, two hundred two billion, eleven million, two hundred twenty-two thousand, one hundred two".