1201101912 has 64 divisors (see below), whose sum is σ = 3353280000. Its totient is φ = 398341152.

The previous prime is 1201101911. The next prime is 1201101917. The reversal of 1201101912 is 2191011021.

It is a happy number.

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 (1201101911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29013 + ... + 56955.

It is an arithmetic number, because the mean of its divisors is an integer number (52395000).

Almost surely, 2^1201101912 is an apocalyptic number.

1201101912 is a gapful number since it is divisible by the number (12) 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 1201101912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1676640000).

1201101912 is an abundant number, since it is smaller than the sum of its proper divisors (2152178088).

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

1201101912 is a wasteful number, since it uses less digits than its factorization.

1201101912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28157 (or 28147 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 1201101912 is about 34656.9172316292. The cubic root of 1201101912 is about 1062.9837352931.

Adding to 1201101912 its reverse (2191011021), we get a palindrome (3392112933).

The spelling of 1201101912 in words is "one billion, two hundred one million, one hundred one thousand, nine hundred twelve".