221221100120003 has 4 divisors (see below), whose sum is σ = 223706730458520. Its totient is φ = 218735469781488.

The previous prime is 221221100119933. The next prime is 221221100120063. The reversal of 221221100120003 is 300021001122122.

221221100120003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221221100120003 - 2¹⁶ = 221221100054467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221100120063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242815169125 + ... + 1242815169302.

It is an arithmetic number, because the mean of its divisors is an integer number (55926682614630).

Almost surely, 2^{221221100120003} is an apocalyptic number.

221221100120003 is a deficient number, since it is larger than the sum of its proper divisors (2485630338517).

221221100120003 is an equidigital number, since it uses as much as digits as its factorization.

221221100120003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485630338516.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221221100120003 its reverse (300021001122122), we get a palindrome (521242101242125).

The spelling of 221221100120003 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred million, one hundred twenty thousand, three".