201201010122121 has 4 divisors (see below), whose sum is σ = 201217219029252. Its totient is φ = 201184801214992.

The previous prime is 201201010122103. The next prime is 201201010122163. The reversal of 201201010122121 is 121221010102102.

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 75616241977600 + 125584768144521 = 8695760^2 + 11206461^2 .

It is a cyclic number.

It is not a de Polignac number, because 201201010122121 - 2²⁹ = 201200473251209 is a prime.

It is a super-3 number, since 3×201201010122121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201201010122095 and 201201010122104.

It is not an unprimeable number, because it can be changed into a prime (201201010123121) 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, 8104434946 + ... + 8104459771.

It is an arithmetic number, because the mean of its divisors is an integer number (50304304757313).

Almost surely, 2^{201201010122121} is an apocalyptic number.

It is an amenable number.

201201010122121 is a deficient number, since it is larger than the sum of its proper divisors (16208907131).

201201010122121 is a wasteful number, since it uses less digits than its factorization.

201201010122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16208907130.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201201010122121 its reverse (121221010102102), we get a palindrome (322422020224223).

The spelling of 201201010122121 in words is "two hundred one trillion, two hundred one billion, ten million, one hundred twenty-two thousand, one hundred twenty-one".