102120201108 has 36 divisors (see below), whose sum is σ = 258159157620. Its totient is φ = 34037168256.

The previous prime is 102120201107. The next prime is 102120201119. The reversal of 102120201108 is 801102021201.

It can be written as a sum of positive squares in 2 ways, for example, as 3374680464 + 98745520644 = 58092^2 + 314238^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 (102120201103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330978 + ... + 560166.

Almost surely, 2^102120201108 is an apocalyptic number.

102120201108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

102120201108 is an abundant number, since it is smaller than the sum of its proper divisors (156038956512).

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

102120201108 is a wasteful number, since it uses less digits than its factorization.

102120201108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241576 (or 241571 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 102120201108 its reverse (801102021201), we get a palindrome (903222222309).

The spelling of 102120201108 in words is "one hundred two billion, one hundred twenty million, two hundred one thousand, one hundred eight".