221112121020311 has 4 divisors (see below), whose sum is σ = 226505099581824. Its totient is φ = 215719142458800.

The previous prime is 221112121020283. The next prime is 221112121020313. The reversal of 221112121020311 is 113020121211122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221112121020311 - 2⁶ = 221112121020247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112121020313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2696489280695 + ... + 2696489280776.

It is an arithmetic number, because the mean of its divisors is an integer number (56626274895456).

Almost surely, 2^{221112121020311} is an apocalyptic number.

221112121020311 is a deficient number, since it is larger than the sum of its proper divisors (5392978561513).

221112121020311 is an equidigital number, since it uses as much as digits as its factorization.

221112121020311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392978561512.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 221112121020311 its reverse (113020121211122), we get a palindrome (334132242231433).

The spelling of 221112121020311 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred twenty-one million, twenty thousand, three hundred eleven".