210101111220001 has 4 divisors (see below), whose sum is σ = 210101192133652. Its totient is φ = 210101030306352.

The previous prime is 210101111219977. The next prime is 210101111220037. The reversal of 210101111220001 is 100022111101012.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 101887523784225 + 108213587435776 = 10093935^2 + 10402576^2 .

It is a cyclic number.

It is not a de Polignac number, because 210101111220001 - 2³¹ = 210098963736353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210101111220041) 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, 36428190 + ... + 41799703.

It is an arithmetic number, because the mean of its divisors is an integer number (52525298033413).

Almost surely, 2^{210101111220001} is an apocalyptic number.

It is an amenable number.

210101111220001 is a deficient number, since it is larger than the sum of its proper divisors (80913651).

210101111220001 is an equidigital number, since it uses as much as digits as its factorization.

210101111220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80913650.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 210101111220001 its reverse (100022111101012), we get a palindrome (310123222321013).

The spelling of 210101111220001 in words is "two hundred ten trillion, one hundred one billion, one hundred eleven million, two hundred twenty thousand, one".