1121272152 has 192 divisors, whose sum is σ = 3793117440. Its totient is φ = 268773120.

The previous prime is 1121272151. The next prime is 1121272157. The reversal of 1121272152 is 2512721211.

It is a happy number.

It is a super-2 number, since 2×1121272152² = 2514502477701422208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121272151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 262143 + ... + 266385.

It is an arithmetic number, because the mean of its divisors is an integer number (19755820).

Almost surely, 2^1121272152 is an apocalyptic number.

1121272152 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 1121272152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1896558720).

1121272152 is an abundant number, since it is smaller than the sum of its proper divisors (2671845288).

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

1121272152 is a wasteful number, since it uses less digits than its factorization.

1121272152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294 (or 4279 counting only the distinct ones).

The product of its digits is 560, while the sum is 24.

The square root of 1121272152 is about 33485.4020731423. The cubic root of 1121272152 is about 1038.8918645564.

Adding to 1121272152 its reverse (2512721211), we get a palindrome (3633993363).

The spelling of 1121272152 in words is "one billion, one hundred twenty-one million, two hundred seventy-two thousand, one hundred fifty-two".