221012120220001 has 16 divisors (see below), whose sum is σ = 247150593345600. Its totient is φ = 195887973081600.

The previous prime is 221012120219999. The next prime is 221012120220011. The reversal of 221012120220001 is 100022021210122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221012120220001 - 2¹ = 221012120219999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221012120220011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163884891 + ... + 165227968.

It is an arithmetic number, because the mean of its divisors is an integer number (15446912084100).

Almost surely, 2^{221012120220001} is an apocalyptic number.

It is an amenable number.

221012120220001 is a deficient number, since it is larger than the sum of its proper divisors (26138473125599).

221012120220001 is a wasteful number, since it uses less digits than its factorization.

221012120220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329114400.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221012120220001 its reverse (100022021210122), we get a palindrome (321034141430123).

The spelling of 221012120220001 in words is "two hundred twenty-one trillion, twelve billion, one hundred twenty million, two hundred twenty thousand, one".