2305402121 has 4 divisors (see below), whose sum is σ = 2514984144. Its totient is φ = 2095820100.

The previous prime is 2305402111. The next prime is 2305402133. The reversal of 2305402121 is 1212045032.

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 not a de Polignac number, because 2305402121 - 2¹⁴ = 2305385737 is a prime.

It is a super-2 number, since 2×2305402121² = 10629757879022597282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2305402093 and 2305402102.

It is not an unprimeable number, because it can be changed into a prime (2305402111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104790995 + ... + 104791016.

It is an arithmetic number, because the mean of its divisors is an integer number (628746036).

Almost surely, 2^2305402121 is an apocalyptic number.

It is an amenable number.

2305402121 is a deficient number, since it is larger than the sum of its proper divisors (209582023).

2305402121 is a wasteful number, since it uses less digits than its factorization.

2305402121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209582022.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2305402121 is about 48014.6032056915. The cubic root of 2305402121 is about 1321.0387677699.

Adding to 2305402121 its reverse (1212045032), we get a palindrome (3517447153).

The spelling of 2305402121 in words is "two billion, three hundred five million, four hundred two thousand, one hundred twenty-one".