2121102111201 has 4 divisors (see below), whose sum is σ = 2828136148272. Its totient is φ = 1414068074132.

The previous prime is 2121102111197. The next prime is 2121102111217. The reversal of 2121102111201 is 1021112011212.

It is a happy number.

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 2121102111201 - 2² = 2121102111197 is a prime.

It is a super-2 number, since 2×2121102111201² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121102116201) 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, 353517018531 + ... + 353517018536.

It is an arithmetic number, because the mean of its divisors is an integer number (707034037068).

Almost surely, 2^{2121102111201} is an apocalyptic number.

It is an amenable number.

2121102111201 is a deficient number, since it is larger than the sum of its proper divisors (707034037071).

2121102111201 is an equidigital number, since it uses as much as digits as its factorization.

2121102111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707034037070.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2121102111201 its reverse (1021112011212), we get a palindrome (3142214122413).

The spelling of 2121102111201 in words is "two trillion, one hundred twenty-one billion, one hundred two million, one hundred eleven thousand, two hundred one".