2421121777 has 4 divisors (see below), whose sum is σ = 2440185856. Its totient is φ = 2402057700.

The previous prime is 2421121757. The next prime is 2421121799. The reversal of 2421121777 is 7771211242.

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.

It is a cyclic number.

It is not a de Polignac number, because 2421121777 - 2¹⁵ = 2421089009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421121727) 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, 9531849 + ... + 9532102.

It is an arithmetic number, because the mean of its divisors is an integer number (610046464).

Almost surely, 2^2421121777 is an apocalyptic number.

It is an amenable number.

2421121777 is a deficient number, since it is larger than the sum of its proper divisors (19064079).

2421121777 is a wasteful number, since it uses less digits than its factorization.

2421121777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19064078.

The product of its digits is 10976, while the sum is 34.

The square root of 2421121777 is about 49204.8958641312. The cubic root of 2421121777 is about 1342.7821044486.

The spelling of 2421121777 in words is "two billion, four hundred twenty-one million, one hundred twenty-one thousand, seven hundred seventy-seven".