201201221021 has 8 divisors (see below), whose sum is σ = 208083141120. Its totient is φ = 194427677808.

The previous prime is 201201220999. The next prime is 201201221057. The reversal of 201201221021 is 120122102102.

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 201201221021 - 2¹⁰ = 201201219997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201201220987 and 201201221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201221521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27090446 + ... + 27097871.

It is an arithmetic number, because the mean of its divisors is an integer number (26010392640).

Almost surely, 2^201201221021 is an apocalyptic number.

It is an amenable number.

201201221021 is a deficient number, since it is larger than the sum of its proper divisors (6881920099).

201201221021 is an equidigital number, since it uses as much as digits as its factorization.

201201221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54188443.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201201221021 its reverse (120122102102), we get a palindrome (321323323123).

The spelling of 201201221021 in words is "two hundred one billion, two hundred one million, two hundred twenty-one thousand, twenty-one".