1201098100 has 72 divisors (see below), whose sum is σ = 2708104448. Its totient is φ = 461894400.

The previous prime is 1201098077. The next prime is 1201098103. The reversal of 1201098100 is 18901021.

It is a super-2 number, since 2×1201098100² = 2885273291647220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201098103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504112 + ... + 506488.

Almost surely, 2^1201098100 is an apocalyptic number.

1201098100 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 1201098100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354052224).

1201098100 is an abundant number, since it is smaller than the sum of its proper divisors (1507006348).

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

1201098100 is a wasteful number, since it uses less digits than its factorization.

1201098100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585 (or 2578 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1201098100 is about 34656.8622353496. The cubic root of 1201098100 is about 1062.9826107429.

Adding to 1201098100 its reverse (18901021), we get a palindrome (1219999121).

The spelling of 1201098100 in words is "one billion, two hundred one million, ninety-eight thousand, one hundred".