1121644311 has 8 divisors (see below), whose sum is σ = 1504481664. Its totient is φ = 743284920.

The previous prime is 1121644273. The next prime is 1121644327. The reversal of 1121644311 is 1134461211.

It is a happy number.

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

It is not a de Polignac number, because 1121644311 - 2¹⁰ = 1121643287 is a prime.

It is a super-3 number, since 3×1121644311³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121645311) 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, 1118905 + ... + 1119906.

It is an arithmetic number, because the mean of its divisors is an integer number (188060208).

Almost surely, 2^1121644311 is an apocalyptic number.

1121644311 is a deficient number, since it is larger than the sum of its proper divisors (382837353).

1121644311 is a wasteful number, since it uses less digits than its factorization.

1121644311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238981.

The product of its digits is 576, while the sum is 24.

The square root of 1121644311 is about 33490.9586455808. The cubic root of 1121644311 is about 1039.0067906217.

The spelling of 1121644311 in words is "one billion, one hundred twenty-one million, six hundred forty-four thousand, three hundred eleven".