202001202121121 has 16 divisors (see below), whose sum is σ = 219257326331904. Its totient is φ = 184990507478784.

The previous prime is 202001202121109. The next prime is 202001202121133. The reversal of 202001202121121 is 121121202100202.

It is an interprime number because it is at equal distance from previous prime (202001202121109) and next prime (202001202121133).

It is a cyclic number.

It is not a de Polignac number, because 202001202121121 - 2⁶ = 202001202121057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202001202121121.

It is not an unprimeable number, because it can be changed into a prime (202001202121151) 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 15 ways as a sum of consecutive naturals, for example, 77884601 + ... + 80436393.

It is an arithmetic number, because the mean of its divisors is an integer number (13703582895744).

Almost surely, 2^{202001202121121} is an apocalyptic number.

It is an amenable number.

202001202121121 is a deficient number, since it is larger than the sum of its proper divisors (17256124210783).

202001202121121 is a wasteful number, since it uses less digits than its factorization.

202001202121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599880.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202001202121121 its reverse (121121202100202), we get a palindrome (323122404221323).

The spelling of 202001202121121 in words is "two hundred two trillion, one billion, two hundred two million, one hundred twenty-one thousand, one hundred twenty-one".