102021221220102 has 48 divisors (see below), whose sum is σ = 227290780473120. Its totient is φ = 33048526075776.

The previous prime is 102021221220101. The next prime is 102021221220119. The reversal of 102021221220102 is 201022122120201.

It is a happy number.

102021221220102 is a `hidden beast` number, since 10 + 202 + 1 + 221 + 220 + 10 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021221220101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90731463 + ... + 91849010.

It is an arithmetic number, because the mean of its divisors is an integer number (4735224593190).

Almost surely, 2^{102021221220102} is an apocalyptic number.

102021221220102 is an abundant number, since it is smaller than the sum of its proper divisors (125269559253018).

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

102021221220102 is a wasteful number, since it uses less digits than its factorization.

102021221220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182581357 (or 182581354 counting only the distinct ones).

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

Adding to 102021221220102 its reverse (201022122120201), we get a palindrome (303043343340303).

Subtracting 102021221220102 from its reverse (201022122120201), we obtain a palindrome (99000900900099).

The spelling of 102021221220102 in words is "one hundred two trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty thousand, one hundred two".