420221066215 has 16 divisors (see below), whose sum is σ = 521161482240. Its totient is φ = 324938950560.

The previous prime is 420221066207. The next prime is 420221066273. The reversal of 420221066215 is 512660122024.

It is not a de Polignac number, because 420221066215 - 2³ = 420221066207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1510935 + ... + 1767304.

It is an arithmetic number, because the mean of its divisors is an integer number (32572592640).

Almost surely, 2^420221066215 is an apocalyptic number.

420221066215 is a deficient number, since it is larger than the sum of its proper divisors (100940416025).

420221066215 is a wasteful number, since it uses less digits than its factorization.

420221066215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279102.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 420221066215 its reverse (512660122024), we get a palindrome (932881188239).

The spelling of 420221066215 in words is "four hundred twenty billion, two hundred twenty-one million, sixty-six thousand, two hundred fifteen".