221357405550812 has 12 divisors (see below), whose sum is σ = 395617490772000. Its totient is φ = 108323836758816.

The previous prime is 221357405550803. The next prime is 221357405550847. The reversal of 221357405550812 is 218055504753122.

It is a super-2 number, since 2×221357405550812² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588716503937 + ... + 588716504312.

It is an arithmetic number, because the mean of its divisors is an integer number (32968124231000).

Almost surely, 2^{221357405550812} is an apocalyptic number.

It is an amenable number.

221357405550812 is a deficient number, since it is larger than the sum of its proper divisors (174260085221188).

221357405550812 is a wasteful number, since it uses less digits than its factorization.

221357405550812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177433008300 (or 1177433008298 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 50.

The spelling of 221357405550812 in words is "two hundred twenty-one trillion, three hundred fifty-seven billion, four hundred five million, five hundred fifty thousand, eight hundred twelve".