1121301551 has 4 divisors (see below), whose sum is σ = 1121420592. Its totient is φ = 1121182512.

The previous prime is 1121301523. The next prime is 1121301553. The reversal of 1121301551 is 1551031211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121301551 - 2¹⁰ = 1121300527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121301553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44051 + ... + 64676.

It is an arithmetic number, because the mean of its divisors is an integer number (280355148).

Almost surely, 2^1121301551 is an apocalyptic number.

1121301551 is a deficient number, since it is larger than the sum of its proper divisors (119041).

1121301551 is a wasteful number, since it uses less digits than its factorization.

1121301551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119040.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 1121301551 is about 33485.8410526001. The cubic root of 1121301551 is about 1038.9009441585.

Adding to 1121301551 its reverse (1551031211), we get a palindrome (2672332762).

The spelling of 1121301551 in words is "one billion, one hundred twenty-one million, three hundred one thousand, five hundred fifty-one".