102100101201220 has 24 divisors (see below), whose sum is σ = 214515989722944. Its totient is φ = 40819892442336.

The previous prime is 102100101201191. The next prime is 102100101201229. The reversal of 102100101201220 is 22102101001201.

It is a self number, because there is not a number n which added to its sum of digits gives 102100101201220.

It is not an unprimeable number, because it can be changed into a prime (102100101201229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1259210832 + ... + 1259291911.

It is an arithmetic number, because the mean of its divisors is an integer number (8938166238456).

Almost surely, 2^{102100101201220} is an apocalyptic number.

102100101201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102100101201220 is an abundant number, since it is smaller than the sum of its proper divisors (112415888521724).

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

102100101201220 is a wasteful number, since it uses less digits than its factorization.

102100101201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518504779 (or 2518504777 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102100101201220 its reverse (22102101001201), we get a palindrome (124202202202421).

The spelling of 102100101201220 in words is "one hundred two trillion, one hundred billion, one hundred one million, two hundred one thousand, two hundred twenty".