221357405550811 has 8 divisors (see below), whose sum is σ = 228809696875904. Its totient is φ = 213924597341760.

The previous prime is 221357405550803. The next prime is 221357405550847. The reversal of 221357405550811 is 118055504753122.

221357405550811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221357405550811 - 2³ = 221357405550803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221357405550311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4870755906 + ... + 4870801351.

It is an arithmetic number, because the mean of its divisors is an integer number (28601212109488).

Almost surely, 2^{221357405550811} is an apocalyptic number.

221357405550811 is a deficient number, since it is larger than the sum of its proper divisors (7452291325093).

221357405550811 is an equidigital number, since it uses as much as digits as its factorization.

221357405550811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9741558021.

The product of its (nonzero) digits is 1680000, while the sum is 49.

The spelling of 221357405550811 in words is "two hundred twenty-one trillion, three hundred fifty-seven billion, four hundred five million, five hundred fifty thousand, eight hundred eleven".