102012002021220 has 192 divisors, whose sum is σ = 299161421217792. Its totient is φ = 25943091264000.

The previous prime is 102012002021191. The next prime is 102012002021227. The reversal of 102012002021220 is 22120200210201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 102012002021220.

It is not an unprimeable number, because it can be changed into a prime (102012002021227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36671010 + ... + 39354630.

It is an arithmetic number, because the mean of its divisors is an integer number (1558132402176).

Almost surely, 2^{102012002021220} is an apocalyptic number.

102012002021220 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 102012002021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149580710608896).

102012002021220 is an abundant number, since it is smaller than the sum of its proper divisors (197149419196572).

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

102012002021220 is a wasteful number, since it uses less digits than its factorization.

102012002021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683962 (or 2683960 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102012002021220 its reverse (22120200210201), we get a palindrome (124132202231421).

The spelling of 102012002021220 in words is "one hundred two trillion, twelve billion, two million, twenty-one thousand, two hundred twenty".