202121121002001 has 4 divisors (see below), whose sum is σ = 269494828002672. Its totient is φ = 134747414001332.

The previous prime is 202121121001951. The next prime is 202121121002029. The reversal of 202121121002001 is 100200121121202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202121121002001 - 2³⁵ = 202086761263633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202121121003001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33686853500331 + ... + 33686853500336.

It is an arithmetic number, because the mean of its divisors is an integer number (67373707000668).

Almost surely, 2^{202121121002001} is an apocalyptic number.

It is an amenable number.

202121121002001 is a deficient number, since it is larger than the sum of its proper divisors (67373707000671).

202121121002001 is an equidigital number, since it uses as much as digits as its factorization.

202121121002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67373707000670.

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

Adding to 202121121002001 its reverse (100200121121202), we get a palindrome (302321242123203).

The spelling of 202121121002001 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred twenty-one million, two thousand, one".