201033311001221 has 4 divisors (see below), whose sum is σ = 201033387806412. Its totient is φ = 201033234196032.

The previous prime is 201033311001203. The next prime is 201033311001227. The reversal of 201033311001221 is 122100113330102.

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 5825049828196 + 195208261173025 = 2413514^2 + 13971695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201033311001221 is a prime.

It is a super-2 number, since 2×201033311001221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201033311001193 and 201033311001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201033311001227) 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, 34332650 + ... + 39759243.

It is an arithmetic number, because the mean of its divisors is an integer number (50258346951603).

Almost surely, 2^{201033311001221} is an apocalyptic number.

It is an amenable number.

201033311001221 is a deficient number, since it is larger than the sum of its proper divisors (76805191).

201033311001221 is an equidigital number, since it uses as much as digits as its factorization.

201033311001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76805190.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 201033311001221 its reverse (122100113330102), we get a palindrome (323133424331323).

The spelling of 201033311001221 in words is "two hundred one trillion, thirty-three billion, three hundred eleven million, one thousand, two hundred twenty-one".