2121122455 has 32 divisors (see below), whose sum is σ = 2693357568. Its totient is φ = 1601241600.

The previous prime is 2121122441. The next prime is 2121122461. The reversal of 2121122455 is 5542211212.

It is not a de Polignac number, because 2121122455 - 2¹⁹ = 2120598167 is a prime.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 3576639 + ... + 3577231.

It is an arithmetic number, because the mean of its divisors is an integer number (84167424).

Almost surely, 2^2121122455 is an apocalyptic number.

2121122455 is a deficient number, since it is larger than the sum of its proper divisors (572235113).

2121122455 is a wasteful number, since it uses less digits than its factorization.

2121122455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167.

The product of its digits is 1600, while the sum is 25.

The square root of 2121122455 is about 46055.6452022985. The cubic root of 2121122455 is about 1284.8583380299.

Adding to 2121122455 its reverse (5542211212), we get a palindrome (7663333667).

The spelling of 2121122455 in words is "two billion, one hundred twenty-one million, one hundred twenty-two thousand, four hundred fifty-five".