221010101311 has 4 divisors (see below), whose sum is σ = 221593241800. Its totient is φ = 220426960824.

The previous prime is 221010101309. The next prime is 221010101327. The reversal of 221010101311 is 113101010122.

It is a happy number.

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 221010101311 - 2¹ = 221010101309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221010101291 and 221010101300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010101911) 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, 291569676 + ... + 291570433.

It is an arithmetic number, because the mean of its divisors is an integer number (55398310450).

Almost surely, 2^221010101311 is an apocalyptic number.

221010101311 is a deficient number, since it is larger than the sum of its proper divisors (583140489).

221010101311 is an equidigital number, since it uses as much as digits as its factorization.

221010101311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583140488.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 221010101311 its reverse (113101010122), we get a palindrome (334111111433).

The spelling of 221010101311 in words is "two hundred twenty-one billion, ten million, one hundred one thousand, three hundred eleven".