1151021312 has 72 divisors (see below), whose sum is σ = 2780297856. Its totient is φ = 464265216.

The previous prime is 1151021293. The next prime is 1151021317. The reversal of 1151021312 is 2131201511.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (1151021317) 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, 11573 + ... + 49355.

It is an arithmetic number, because the mean of its divisors is an integer number (38615248).

Almost surely, 2^1151021312 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 1151021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1390148928).

1151021312 is an abundant number, since it is smaller than the sum of its proper divisors (1629276544).

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

1151021312 is an equidigital number, since it uses as much as digits as its factorization.

1151021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37823 (or 37809 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1151021312 is about 33926.7049976858. The cubic root of 1151021312 is about 1047.9996115221. Note that the first 3 decimals are identical.

Adding to 1151021312 its reverse (2131201511), we get a palindrome (3282222823).

The spelling of 1151021312 in words is "one billion, one hundred fifty-one million, twenty-one thousand, three hundred twelve".