221212112101001 has 8 divisors (see below), whose sum is σ = 252814229312064. Its totient is φ = 189610091617680.

The previous prime is 221212112100977. The next prime is 221212112101061. The reversal of 221212112101001 is 100101211212122.

221212112101001 is digitally balanced in base 2, because in such base 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 a cyclic number.

It is not a de Polignac number, because 221212112101001 - 2³⁴ = 221194932231817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221212112101061) 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, 19213250 + ... + 28488123.

It is an arithmetic number, because the mean of its divisors is an integer number (31601778664008).

Almost surely, 2^{221212112101001} is an apocalyptic number.

It is an amenable number.

221212112101001 is a deficient number, since it is larger than the sum of its proper divisors (31602117211063).

221212112101001 is an equidigital number, since it uses as much as digits as its factorization.

221212112101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48363871.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221212112101001 its reverse (100101211212122), we get a palindrome (321313323313123).

The spelling of 221212112101001 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred twelve million, one hundred one thousand, one".