2121021011201 has 4 divisors (see below), whose sum is σ = 2121025117872. Its totient is φ = 2121016904532.

The previous prime is 2121021011177. The next prime is 2121021011243. The reversal of 2121021011201 is 1021101201212.

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 2121021011201 - 2¹⁰ = 2121021010177 is a prime.

It is a super-2 number, since 2×2121021011201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2121021011261) 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, 1144535 + ... + 2356268.

It is an arithmetic number, because the mean of its divisors is an integer number (530256279468).

Almost surely, 2^{2121021011201} is an apocalyptic number.

It is an amenable number.

2121021011201 is a deficient number, since it is larger than the sum of its proper divisors (4106671).

2121021011201 is an equidigital number, since it uses as much as digits as its factorization.

2121021011201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106670.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2121021011201 its reverse (1021101201212), we get a palindrome (3142122212413).

The spelling of 2121021011201 in words is "two trillion, one hundred twenty-one billion, twenty-one million, eleven thousand, two hundred one".