121202222001001 has 4 divisors (see below), whose sum is σ = 121220309192004. Its totient is φ = 121184134810000.

The previous prime is 121202222000987. The next prime is 121202222001109. The reversal of 121202222001001 is 100100222202121.

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 95348291976025 + 25853930024976 = 9764645^2 + 5084676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121202222001001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121202222001401) 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, 9043585450 + ... + 9043598851.

It is an arithmetic number, because the mean of its divisors is an integer number (30305077298001).

Almost surely, 2^{121202222001001} is an apocalyptic number.

It is an amenable number.

121202222001001 is a deficient number, since it is larger than the sum of its proper divisors (18087191003).

121202222001001 is an equidigital number, since it uses as much as digits as its factorization.

121202222001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18087191002.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121202222001001 its reverse (100100222202121), we get a palindrome (221302444203122).

The spelling of 121202222001001 in words is "one hundred twenty-one trillion, two hundred two billion, two hundred twenty-two million, one thousand, one".