421221225055553 has 8 divisors (see below), whose sum is σ = 453623023672896. Its totient is φ = 388819450141200.

The previous prime is 421221225055489. The next prime is 421221225055567. The reversal of 421221225055553 is 355550522122124.

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

It is not a de Polignac number, because 421221225055553 - 2⁶ = 421221225055489 is a prime.

It is a super-2 number, since 2×421221225055553² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421221225055573) 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, 51836588 + ... + 59409378.

It is an arithmetic number, because the mean of its divisors is an integer number (56702877959112).

Almost surely, 2^{421221225055553} is an apocalyptic number.

It is an amenable number.

421221225055553 is a deficient number, since it is larger than the sum of its proper divisors (32401798617343).

421221225055553 is a wasteful number, since it uses less digits than its factorization.

421221225055553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11851495.

The product of its (nonzero) digits is 1200000, while the sum is 44.

Adding to 421221225055553 its reverse (355550522122124), we get a palindrome (776771747177677).

The spelling of 421221225055553 in words is "four hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-five million, fifty-five thousand, five hundred fifty-three".