121220022121001 has 4 divisors (see below), whose sum is σ = 121220755402500. Its totient is φ = 121219288839504.

The previous prime is 121220022120943. The next prime is 121220022121049. The reversal of 121220022121001 is 100121220022121.

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 32760730242601 + 88459291878400 = 5723699^2 + 9405280^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220022121001 - 2⁶ = 121220022120937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220022123001) 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, 366392726 + ... + 366723423.

It is an arithmetic number, because the mean of its divisors is an integer number (30305188850625).

Almost surely, 2^{121220022121001} is an apocalyptic number.

It is an amenable number.

121220022121001 is a deficient number, since it is larger than the sum of its proper divisors (733281499).

121220022121001 is an equidigital number, since it uses as much as digits as its factorization.

121220022121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733281498.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121220022121001 its reverse (100121220022121), we get a palindrome (221341242143122).

The spelling of 121220022121001 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-two million, one hundred twenty-one thousand, one".