221121220120101 has 24 divisors (see below), whose sum is σ = 378544969426624. Its totient is φ = 126354982924800.

The previous prime is 221121220120081. The next prime is 221121220120139. The reversal of 221121220120101 is 101021022121122.

221121220120101 is a `hidden beast` number, since 2 + 211 + 212 + 20 + 120 + 101 = 666.

221121220120101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221121220120101 - 2⁵ = 221121220120069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221121220120201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64997417500 + ... + 64997420901.

Almost surely, 2^{221121220120101} is an apocalyptic number.

221121220120101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221121220120101 is a deficient number, since it is larger than the sum of its proper divisors (157423749306523).

221121220120101 is an equidigital number, since it uses as much as digits as its factorization.

221121220120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129994838423 (or 129994838411 counting only the distinct ones).

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

Adding to 221121220120101 its reverse (101021022121122), we get a palindrome (322142242241223).

The spelling of 221121220120101 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, one hundred one".