1201210102100 has 72 divisors (see below), whose sum is σ = 2633991023160. Its totient is φ = 475441643520.

The previous prime is 1201210102093. The next prime is 1201210102177. The reversal of 1201210102100 is 12010121021.

It can be written as a sum of positive squares in 12 ways, for example, as 287797915024 + 913412187076 = 536468^2 + 955726^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81171902 + ... + 81186698.

It is an arithmetic number, because the mean of its divisors is an integer number (36583208655).

Almost surely, 2^{1201210102100} is an apocalyptic number.

1201210102100 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 1201210102100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316995511580).

1201210102100 is an abundant number, since it is smaller than the sum of its proper divisors (1432780921060).

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

1201210102100 is a wasteful number, since it uses less digits than its factorization.

1201210102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23277 (or 23270 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201210102100 its reverse (12010121021), we get a palindrome (1213220223121).

The spelling of 1201210102100 in words is "one trillion, two hundred one billion, two hundred ten million, one hundred two thousand, one hundred".