221421330051670 has 64 divisors (see below), whose sum is σ = 455858652727296. Its totient is φ = 75855335207040.

The previous prime is 221421330051667. The next prime is 221421330051709. The reversal of 221421330051670 is 76150033124122.

221421330051670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1442529667 + ... + 1442683153.

It is an arithmetic number, because the mean of its divisors is an integer number (7122791448864).

Almost surely, 2^{221421330051670} is an apocalyptic number.

221421330051670 is an abundant number, since it is smaller than the sum of its proper divisors (234437322675626).

221421330051670 is a wasteful number, since it uses less digits than its factorization.

221421330051670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169805.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 221421330051670 its reverse (76150033124122), we get a palindrome (297571363175792).

The spelling of 221421330051670 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, three hundred thirty million, fifty-one thousand, six hundred seventy".