201000020121121 has 4 divisors (see below), whose sum is σ = 216461560130452. Its totient is φ = 185538480111792.

The previous prime is 201000020121077. The next prime is 201000020121133. The reversal of 201000020121121 is 121121020000102.

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 117542458890000 + 83457561231121 = 10841700^2 + 9135511^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000020121121 - 2⁹ = 201000020120609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 15461540009317 = 201000020121121 / (2 + 0 + 1 + 0 + 0 + 0 + 0 + 2 + 0 + 1 + 2 + 1 + 1 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (201000020121821) 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, 7730770004646 + ... + 7730770004671.

It is an arithmetic number, because the mean of its divisors is an integer number (54115390032613).

Almost surely, 2^{201000020121121} is an apocalyptic number.

It is an amenable number.

201000020121121 is a deficient number, since it is larger than the sum of its proper divisors (15461540009331).

201000020121121 is a wasteful number, since it uses less digits than its factorization.

201000020121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15461540009330.

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

Adding to 201000020121121 its reverse (121121020000102), we get a palindrome (322121040121223).

The spelling of 201000020121121 in words is "two hundred one trillion, twenty million, one hundred twenty-one thousand, one hundred twenty-one".