21102101021202 has 32 divisors (see below), whose sum is σ = 42215039870784. Its totient is φ = 7032227630400.

The previous prime is 21102101021189. The next prime is 21102101021249. The reversal of 21102101021202 is 20212010120112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438771177 + ... + 438819267.

It is an arithmetic number, because the mean of its divisors is an integer number (1319219995962).

Almost surely, 2^{21102101021202} is an apocalyptic number.

21102101021202 is an abundant number, since it is smaller than the sum of its proper divisors (21112938849582).

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

21102101021202 is a wasteful number, since it uses less digits than its factorization.

21102101021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65354.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21102101021202 its reverse (20212010120112), we get a palindrome (41314111141314).

The spelling of 21102101021202 in words is "twenty-one trillion, one hundred two billion, one hundred one million, twenty-one thousand, two hundred two".