220001100121 has 8 divisors (see below), whose sum is σ = 240820320384. Its totient is φ = 199318399920.

The previous prime is 220001100107. The next prime is 220001100127. The reversal of 220001100121 is 121001100022.

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 220001100121 - 2²⁵ = 219967545689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220001100098 and 220001100107.

It is not an unprimeable number, because it can be changed into a prime (220001100127) 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, 34126641 + ... + 34133086.

It is an arithmetic number, because the mean of its divisors is an integer number (30102540048).

Almost surely, 2^220001100121 is an apocalyptic number.

It is an amenable number.

220001100121 is a deficient number, since it is larger than the sum of its proper divisors (20819220263).

220001100121 is a wasteful number, since it uses less digits than its factorization.

220001100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68260031.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 220001100121 its reverse (121001100022), we get a palindrome (341002200143).

Subtracting from 220001100121 its reverse (121001100022), we obtain a palindrome (99000000099).

The spelling of 220001100121 in words is "two hundred twenty billion, one million, one hundred thousand, one hundred twenty-one".