221221122111201 has 8 divisors (see below), whose sum is σ = 294964014921664. Its totient is φ = 147479488687440.

The previous prime is 221221122111133. The next prime is 221221122111203. The reversal of 221221122111201 is 102111221122122.

221221122111201 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221221122111201 - 2¹⁵ = 221221122078433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221122111203) 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, 314436730 + ... + 315139491.

It is an arithmetic number, because the mean of its divisors is an integer number (36870501865208).

Almost surely, 2^{221221122111201} is an apocalyptic number.

It is an amenable number.

221221122111201 is a deficient number, since it is larger than the sum of its proper divisors (73742892810463).

221221122111201 is a wasteful number, since it uses less digits than its factorization.

221221122111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629693351.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221221122111201 its reverse (102111221122122), we get a palindrome (323332343233323).

The spelling of 221221122111201 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred one".