102021110100 has 864 divisors, whose sum is σ = 408882329856. Its totient is φ = 20702822400.

The previous prime is 102021110089. The next prime is 102021110153. The reversal of 102021110100 is 1011120201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

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 287 ways as a sum of consecutive naturals, for example, 396969172 + ... + 396969428.

Almost surely, 2^102021110100 is an apocalyptic number.

102021110100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102021110100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204441164928).

102021110100 is an abundant number, since it is smaller than the sum of its proper divisors (306861219756).

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

102021110100 is a wasteful number, since it uses less digits than its factorization.

102021110100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 102021110100 its reverse (1011120201), we get a palindrome (103032230301).

The spelling of 102021110100 in words is "one hundred two billion, twenty-one million, one hundred ten thousand, one hundred".