221421255572144 has 40 divisors (see below), whose sum is σ = 436325624154000. Its totient is φ = 108821530566656.

The previous prime is 221421255572093. The next prime is 221421255572269. The reversal of 221421255572144 is 441275552124122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5495849 + ... + 21749640.

It is an arithmetic number, because the mean of its divisors is an integer number (10908140603850).

Almost surely, 2^{221421255572144} is an apocalyptic number.

It is an amenable number.

221421255572144 is a deficient number, since it is larger than the sum of its proper divisors (214904368581856).

221421255572144 is a wasteful number, since it uses less digits than its factorization.

221421255572144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27254165 (or 27254159 counting only the distinct ones).

The product of its digits is 1792000, while the sum is 47.

The spelling of 221421255572144 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, five hundred seventy-two thousand, one hundred forty-four".