1211102300320 has 144 divisors (see below), whose sum is σ = 3146024050344. Its totient is φ = 440255692800.

The previous prime is 1211102300281. The next prime is 1211102300329. The reversal of 1211102300320 is 230032011121.

It can be written as a sum of positive squares in 4 ways, for example, as 833649345936 + 377452954384 = 913044^2 + 614372^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1211102300294 and 1211102300303.

It is not an unprimeable number, because it can be changed into a prime (1211102300329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71565460 + ... + 71582380.

Almost surely, 2^{1211102300320} is an apocalyptic number.

1211102300320 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 1211102300320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573012025172).

1211102300320 is an abundant number, since it is smaller than the sum of its proper divisors (1934921750024).

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

1211102300320 is a wasteful number, since it uses less digits than its factorization.

1211102300320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20655 (or 20636 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1211102300320 its reverse (230032011121), we get a palindrome (1441134311441).

The spelling of 1211102300320 in words is "one trillion, two hundred eleven billion, one hundred two million, three hundred thousand, three hundred twenty".