102001021200 has 480 divisors, whose sum is σ = 411563241600. Its totient is φ = 23785850880.

The previous prime is 102001021141. The next prime is 102001021249. The reversal of 102001021200 is 2120100201.

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

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 95 ways as a sum of consecutive naturals, for example, 2648482 + ... + 2686718.

It is an arithmetic number, because the mean of its divisors is an integer number (857423420).

Almost surely, 2^102001021200 is an apocalyptic number.

102001021200 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 102001021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205781620800).

102001021200 is an abundant number, since it is smaller than the sum of its proper divisors (309562220400).

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

102001021200 is a wasteful number, since it uses less digits than its factorization.

102001021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38296 (or 38279 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 102001021200 its reverse (2120100201), we get a palindrome (104121121401).

The spelling of 102001021200 in words is "one hundred two billion, one million, twenty-one thousand, two hundred".