220001210001 has 20 divisors (see below), whose sum is σ = 328661361600. Its totient is φ = 146659628376.

The previous prime is 220001209991. The next prime is 220001210003. The reversal of 220001210001 is 100012100022.

It is not a de Polignac number, because 220001210001 - 2²¹ = 219999112849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (220001210003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1723540 + ... + 1846778.

It is an arithmetic number, because the mean of its divisors is an integer number (16433068080).

Almost surely, 2^220001210001 is an apocalyptic number.

It is an amenable number.

220001210001 is a deficient number, since it is larger than the sum of its proper divisors (108660151599).

220001210001 is a wasteful number, since it uses less digits than its factorization.

220001210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145290 (or 145281 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 220001210001 its reverse (100012100022), we get a palindrome (320013310023).

The spelling of 220001210001 in words is "two hundred twenty billion, one million, two hundred ten thousand, one".