1211345152 has 72 divisors (see below), whose sum is σ = 2556226400. Its totient is φ = 571318272.

The previous prime is 1211345029. The next prime is 1211345153. The reversal of 1211345152 is 2515431121.

It is not an unprimeable number, because it can be changed into a prime (1211345153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1638799 + ... + 1639537.

Almost surely, 2^1211345152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211345152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278113200).

1211345152 is an abundant number, since it is smaller than the sum of its proper divisors (1344881248).

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

1211345152 is an equidigital number, since it uses as much as digits as its factorization.

1211345152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 1097 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 1211345152 is about 34804.3840916629. The cubic root of 1211345152 is about 1065.9969657310.

Adding to 1211345152 its reverse (2515431121), we get a palindrome (3726776273).

The spelling of 1211345152 in words is "one billion, two hundred eleven million, three hundred forty-five thousand, one hundred fifty-two".