2153112415221 has 16 divisors (see below), whose sum is σ = 2879103467520. Its totient is φ = 1431265627440.

The previous prime is 2153112415217. The next prime is 2153112415247. The reversal of 2153112415221 is 1225142113512.

It is not a de Polignac number, because 2153112415221 - 2² = 2153112415217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153112415621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11173116 + ... + 11364186.

It is an arithmetic number, because the mean of its divisors is an integer number (179943966720).

Almost surely, 2^{2153112415221} is an apocalyptic number.

It is an amenable number.

2153112415221 is a deficient number, since it is larger than the sum of its proper divisors (725991052299).

2153112415221 is a wasteful number, since it uses less digits than its factorization.

2153112415221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201896.

The product of its digits is 4800, while the sum is 30.

Adding to 2153112415221 its reverse (1225142113512), we get a palindrome (3378254528733).

The spelling of 2153112415221 in words is "two trillion, one hundred fifty-three billion, one hundred twelve million, four hundred fifteen thousand, two hundred twenty-one".