201121020121 has 8 divisors (see below), whose sum is σ = 230057280704. Its totient is φ = 172235931120.

The previous prime is 201121020109. The next prime is 201121020227. The reversal of 201121020121 is 121020121102.

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 201121020121 - 2⁷ = 201121019993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201121020101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12784470 + ... + 12800191.

It is an arithmetic number, because the mean of its divisors is an integer number (28757160088).

Almost surely, 2^201121020121 is an apocalyptic number.

It is an amenable number.

201121020121 is a deficient number, since it is larger than the sum of its proper divisors (28936260583).

201121020121 is a wasteful number, since it uses less digits than its factorization.

201121020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25585791.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201121020121 its reverse (121020121102), we get a palindrome (322141141223).

The spelling of 201121020121 in words is "two hundred one billion, one hundred twenty-one million, twenty thousand, one hundred twenty-one".