220001302121 has 4 divisors (see below), whose sum is σ = 220008289872. Its totient is φ = 219994314372.

The previous prime is 220001302061. The next prime is 220001302181. The reversal of 220001302121 is 121203100022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (220001302061) and next prime (220001302181).

It is a cyclic number.

It is not a de Polignac number, because 220001302121 - 2²⁶ = 219934193257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220001302096 and 220001302105.

It is not an unprimeable number, because it can be changed into a prime (220001302181) 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, 3446435 + ... + 3509688.

It is an arithmetic number, because the mean of its divisors is an integer number (55002072468).

Almost surely, 2^220001302121 is an apocalyptic number.

It is an amenable number.

220001302121 is a deficient number, since it is larger than the sum of its proper divisors (6987751).

220001302121 is an equidigital number, since it uses as much as digits as its factorization.

220001302121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6987750.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 220001302121 its reverse (121203100022), we get a palindrome (341204402143).

The spelling of 220001302121 in words is "two hundred twenty billion, one million, three hundred two thousand, one hundred twenty-one".