221120210121201 has 12 divisors (see below), whose sum is σ = 322558194303540. Its totient is φ = 145953934072800.

The previous prime is 221120210121157. The next prime is 221120210121211. The reversal of 221120210121201 is 102121012021122.

221120210121201 is a `hidden beast` number, since 2 + 211 + 20 + 210 + 1 + 21 + 201 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 204962029085025 + 16158181036176 = 14316495^2 + 4019724^2 .

It is not a de Polignac number, because 221120210121201 - 2⁷ = 221120210121073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221120210121211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121628277486 + ... + 121628279303.

It is an arithmetic number, because the mean of its divisors is an integer number (26879849525295).

Almost surely, 2^{221120210121201} is an apocalyptic number.

It is an amenable number.

221120210121201 is a deficient number, since it is larger than the sum of its proper divisors (101437984182339).

221120210121201 is a wasteful number, since it uses less digits than its factorization.

221120210121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243256556896 (or 243256556893 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221120210121201 its reverse (102121012021122), we get a palindrome (323241222142323).

The spelling of 221120210121201 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred ten million, one hundred twenty-one thousand, two hundred one".