221012101331 has 16 divisors (see below), whose sum is σ = 279071184384. Its totient is φ = 170543497344.

The previous prime is 221012101319. The next prime is 221012101339. The reversal of 221012101331 is 133101210122.

221012101331 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 221012101331 - 2¹⁰ = 221012100307 is a prime.

It is a super-2 number, since 2×221012101331² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221012101339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40372145 + ... + 40377618.

It is an arithmetic number, because the mean of its divisors is an integer number (17441949024).

Almost surely, 2^221012101331 is an apocalyptic number.

221012101331 is a deficient number, since it is larger than the sum of its proper divisors (58059083053).

221012101331 is a wasteful number, since it uses less digits than its factorization.

221012101331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80749810.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221012101331 its reverse (133101210122), we get a palindrome (354113311453).

The spelling of 221012101331 in words is "two hundred twenty-one billion, twelve million, one hundred one thousand, three hundred thirty-one".