221131103211291 has 24 divisors (see below), whose sum is σ = 364875666504960. Its totient is φ = 116640581911776.

The previous prime is 221131103211289. The next prime is 221131103211301. The reversal of 221131103211291 is 192112301131122.

221131103211291 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 221131103211291 - 2¹ = 221131103211289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221131103211191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31153998031 + ... + 31154005128.

It is an arithmetic number, because the mean of its divisors is an integer number (15203152771040).

Almost surely, 2^{221131103211291} is an apocalyptic number.

221131103211291 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221131103211291 is a deficient number, since it is larger than the sum of its proper divisors (143744563293669).

221131103211291 is a wasteful number, since it uses less digits than its factorization.

221131103211291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62308003195 (or 62308003182 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 221131103211291 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, one hundred three million, two hundred eleven thousand, two hundred ninety-one".