2215110011721 has 32 divisors (see below), whose sum is σ = 3121022361600. Its totient is φ = 1393575451200.

The previous prime is 2215110011701. The next prime is 2215110011731. The reversal of 2215110011721 is 1271100115122.

2215110011721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2215110011721 - 2¹⁹ = 2215109487433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2215110011691 and 2215110011700.

It is not an unprimeable number, because it can be changed into a prime (2215110011701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140304390 + ... + 140320176.

It is an arithmetic number, because the mean of its divisors is an integer number (97531948800).

Almost surely, 2^{2215110011721} is an apocalyptic number.

It is an amenable number.

2215110011721 is a deficient number, since it is larger than the sum of its proper divisors (905912349879).

2215110011721 is a wasteful number, since it uses less digits than its factorization.

2215110011721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25229.

The product of its (nonzero) digits is 280, while the sum is 24.

Adding to 2215110011721 its reverse (1271100115122), we get a palindrome (3486210126843).

The spelling of 2215110011721 in words is "two trillion, two hundred fifteen billion, one hundred ten million, eleven thousand, seven hundred twenty-one".