2215568121 has 16 divisors (see below), whose sum is σ = 3204223680. Its totient is φ = 1353614400.

The previous prime is 2215568107. The next prime is 2215568137. The reversal of 2215568121 is 1218655122.

It is not a de Polignac number, because 2215568121 - 2¹⁹ = 2215043833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2215568161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198930 + ... + 209771.

It is an arithmetic number, because the mean of its divisors is an integer number (200263980).

Almost surely, 2^2215568121 is an apocalyptic number.

It is an amenable number.

2215568121 is a deficient number, since it is larger than the sum of its proper divisors (988655559).

2215568121 is a wasteful number, since it uses less digits than its factorization.

2215568121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408856.

The product of its digits is 9600, while the sum is 33.

The square root of 2215568121 is about 47069.8217651183. The cubic root of 2215568121 is about 1303.6520819035.

The spelling of 2215568121 in words is "two billion, two hundred fifteen million, five hundred sixty-eight thousand, one hundred twenty-one".