200121202121001 has 32 divisors (see below), whose sum is σ = 305690661212160. Its totient is φ = 114075976392576.

The previous prime is 200121202120999. The next prime is 200121202121003. The reversal of 200121202121001 is 100121202121002.

It is an interprime number because it is at equal distance from previous prime (200121202120999) and next prime (200121202121003).

It is not a de Polignac number, because 200121202121001 - 2¹ = 200121202120999 is a prime.

It is a super-4 number, since 4×200121202121001⁴ (a number of 58 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (200121202121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167350725 + ... + 168542301.

It is an arithmetic number, because the mean of its divisors is an integer number (9552833162880).

Almost surely, 2^{200121202121001} is an apocalyptic number.

200121202121001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

200121202121001 is a deficient number, since it is larger than the sum of its proper divisors (105569459091159).

200121202121001 is a wasteful number, since it uses less digits than its factorization.

200121202121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211093.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 200121202121001 its reverse (100121202121002), we get a palindrome (300242404242003).

Subtracting from 200121202121001 its reverse (100121202121002), we obtain a palindrome (99999999999999).

The spelling of 200121202121001 in words is "two hundred trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty-one thousand, one".