221421255572276 has 12 divisors (see below), whose sum is σ = 387487409551872. Its totient is φ = 110710567128888.

The previous prime is 221421255572273. The next prime is 221421255572287. The reversal of 221421255572276 is 672275552124122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221421255572273) by changing a digit.

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, 6386420 + ... + 21991563.

It is an arithmetic number, because the mean of its divisors is an integer number (32290617462656).

Almost surely, 2^{221421255572276} is an apocalyptic number.

It is an amenable number.

221421255572276 is a deficient number, since it is larger than the sum of its proper divisors (166066153979596).

221421255572276 is a wasteful number, since it uses less digits than its factorization.

221421255572276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30328630 (or 30328628 counting only the distinct ones).

The product of its digits is 9408000, while the sum is 53.

The spelling of 221421255572276 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, five hundred seventy-two thousand, two hundred seventy-six".