221421255572153 has 32 divisors (see below), whose sum is σ = 273961571745792. Its totient is φ = 174262843886400.

The previous prime is 221421255572093. The next prime is 221421255572269. The reversal of 221421255572153 is 351275552124122.

221421255572153 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 221421255572153 - 2¹² = 221421255568057 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221421255572098 and 221421255572107.

It is not an unprimeable number, because it can be changed into a prime (221421255572053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298426250 + ... + 299167292.

It is an arithmetic number, because the mean of its divisors is an integer number (8561299117056).

Almost surely, 2^{221421255572153} is an apocalyptic number.

It is an amenable number.

221421255572153 is a deficient number, since it is larger than the sum of its proper divisors (52540316173639).

221421255572153 is a wasteful number, since it uses less digits than its factorization.

221421255572153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758445.

The product of its digits is 1680000, while the sum is 47.

The spelling of 221421255572153 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 fifty-three".