1121755501 has 4 divisors (see below), whose sum is σ = 1121913504. Its totient is φ = 1121597500.

The previous prime is 1121755499. The next prime is 1121755507. The reversal of 1121755501 is 1055571211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1055571211 = 163 ⋅6475897.

It is a cyclic number.

It is not a de Polignac number, because 1121755501 - 2¹ = 1121755499 is a prime.

It is a super-2 number, since 2×1121755501² = 2516670808047522002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121755501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121755507) 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, 67825 + ... + 82726.

It is an arithmetic number, because the mean of its divisors is an integer number (280478376).

Almost surely, 2^1121755501 is an apocalyptic number.

It is an amenable number.

1121755501 is a deficient number, since it is larger than the sum of its proper divisors (158003).

1121755501 is an equidigital number, since it uses as much as digits as its factorization.

1121755501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158002.

The product of its (nonzero) digits is 1750, while the sum is 28.

The square root of 1121755501 is about 33492.6186047015. The cubic root of 1121755501 is about 1039.0411221671.

The spelling of 1121755501 in words is "one billion, one hundred twenty-one million, seven hundred fifty-five thousand, five hundred one".