2561121214 has 8 divisors (see below), whose sum is σ = 3843021168. Its totient is φ = 1280114160.

The previous prime is 2561121209. The next prime is 2561121223. The reversal of 2561121214 is 4121211652.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216007 + ... + 227554.

It is an arithmetic number, because the mean of its divisors is an integer number (480377646).

Almost surely, 2^2561121214 is an apocalyptic number.

2561121214 is a deficient number, since it is larger than the sum of its proper divisors (1281899954).

2561121214 is a wasteful number, since it uses less digits than its factorization.

2561121214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446450.

The product of its digits is 960, while the sum is 25.

The square root of 2561121214 is about 50607.5213184760. The cubic root of 2561121214 is about 1368.1804416265.

Adding to 2561121214 its reverse (4121211652), we get a palindrome (6682332866).

The spelling of 2561121214 in words is "two billion, five hundred sixty-one million, one hundred twenty-one thousand, two hundred fourteen".