1121151261 has 8 divisors (see below), whose sum is σ = 1559862720. Its totient is φ = 714936992.

The previous prime is 1121151247. The next prime is 1121151263. The reversal of 1121151261 is 1621511211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121151261 - 2¹¹ = 1121149213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121151263) 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, 8124216 + ... + 8124353.

It is an arithmetic number, because the mean of its divisors is an integer number (194982840).

Almost surely, 2^1121151261 is an apocalyptic number.

It is an amenable number.

1121151261 is a deficient number, since it is larger than the sum of its proper divisors (438711459).

1121151261 is a wasteful number, since it uses less digits than its factorization.

1121151261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16248595.

The product of its digits is 120, while the sum is 21.

The square root of 1121151261 is about 33483.5968945990. The cubic root of 1121151261 is about 1038.8545268503.

Adding to 1121151261 its reverse (1621511211), we get a palindrome (2742662472).

The spelling of 1121151261 in words is "one billion, one hundred twenty-one million, one hundred fifty-one thousand, two hundred sixty-one".