1201313100 has 144 divisors (see below), whose sum is σ = 3786320160. Its totient is φ = 292300800.

The previous prime is 1201313083. The next prime is 1201313119. The reversal of 1201313100 is 13131021.

It is a super-2 number, since 2×1201313100² = 2886306328463220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 345370 + ... + 348830.

It is an arithmetic number, because the mean of its divisors is an integer number (26293890).

Almost surely, 2^1201313100 is an apocalyptic number.

1201313100 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 1201313100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893160080).

1201313100 is an abundant number, since it is smaller than the sum of its proper divisors (2585007060).

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

1201313100 is a wasteful number, since it uses less digits than its factorization.

1201313100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580 (or 3573 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1201313100 is about 34659.9639353534. The cubic root of 1201313100 is about 1063.0460326028.

Adding to 1201313100 its reverse (13131021), we get a palindrome (1214444121).

The spelling of 1201313100 in words is "one billion, two hundred one million, three hundred thirteen thousand, one hundred".