1201102100 has 144 divisors (see below), whose sum is σ = 3027931200. Its totient is φ = 408960000.

The previous prime is 1201102057. The next prime is 1201102109. The reversal of 1201102100 is 12011021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201102109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2110616 + ... + 2111184.

It is an arithmetic number, because the mean of its divisors is an integer number (21027300).

Almost surely, 2^1201102100 is an apocalyptic number.

1201102100 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 1201102100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513965600).

1201102100 is an abundant number, since it is smaller than the sum of its proper divisors (1826829100).

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

1201102100 is a wasteful number, since it uses less digits than its factorization.

1201102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1201102100 is about 34656.9199439304. The cubic root of 1201102100 is about 1062.9837907536.

Adding to 1201102100 its reverse (12011021), we get a palindrome (1213113121).

1201102100 divided by its reverse (12011021) gives a square (100 = 10²).

It can be divided in two parts, 1201 and 102100, that added together give a palindrome (103301).

The spelling of 1201102100 in words is "one billion, two hundred one million, one hundred two thousand, one hundred".