1121777421 has 8 divisors (see below), whose sum is σ = 1530487200. Its totient is φ = 730459632.

The previous prime is 1121777417. The next prime is 1121777441. The reversal of 1121777421 is 1247771211.

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

It is not a de Polignac number, because 1121777421 - 2² = 1121777417 is a prime.

It is a super-2 number, since 2×1121777421² = 2516769164530822482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121777441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4347846 + ... + 4348103.

It is an arithmetic number, because the mean of its divisors is an integer number (191310900).

Almost surely, 2^1121777421 is an apocalyptic number.

It is an amenable number.

1121777421 is a deficient number, since it is larger than the sum of its proper divisors (408709779).

1121777421 is an equidigital number, since it uses as much as digits as its factorization.

1121777421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8695995.

The product of its digits is 5488, while the sum is 33.

The square root of 1121777421 is about 33492.9458393853. The cubic root of 1121777421 is about 1039.0478900213.

The spelling of 1121777421 in words is "one billion, one hundred twenty-one million, seven hundred seventy-seven thousand, four hundred twenty-one".