1211301234 has 144 divisors (see below), whose sum is σ = 3137097600. Its totient is φ = 335522880.

The previous prime is 1211301229. The next prime is 1211301269. The reversal of 1211301234 is 4321031121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5068087 + ... + 5068325.

It is an arithmetic number, because the mean of its divisors is an integer number (21785400).

Almost surely, 2^1211301234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211301234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1568548800).

1211301234 is an abundant number, since it is smaller than the sum of its proper divisors (1925796366).

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

1211301234 is a wasteful number, since it uses less digits than its factorization.

1211301234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1211301234 is about 34803.7531596809. The cubic root of 1211301234 is about 1065.9840828020.

Adding to 1211301234 its reverse (4321031121), we get a palindrome (5532332355).

The spelling of 1211301234 in words is "one billion, two hundred eleven million, three hundred one thousand, two hundred thirty-four".