201021310121 has 16 divisors (see below), whose sum is σ = 211884131328. Its totient is φ = 190471046400.

The previous prime is 201021310109. The next prime is 201021310153. The reversal of 201021310121 is 121013120102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201021310121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201021310096 and 201021310105.

It is not an unprimeable number, because it can be changed into a prime (201021310181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14165 + ... + 634226.

It is an arithmetic number, because the mean of its divisors is an integer number (13242758208).

Almost surely, 2^201021310121 is an apocalyptic number.

It is an amenable number.

201021310121 is a deficient number, since it is larger than the sum of its proper divisors (10862821207).

201021310121 is a wasteful number, since it uses less digits than its factorization.

201021310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648632.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 201021310121 its reverse (121013120102), we get a palindrome (322034430223).

The spelling of 201021310121 in words is "two hundred one billion, twenty-one million, three hundred ten thousand, one hundred twenty-one".