2121210211201 has 4 divisors (see below), whose sum is σ = 2123021664304. Its totient is φ = 2119398758100.

The previous prime is 2121210211187. The next prime is 2121210211217. The reversal of 2121210211201 is 1021120121212.

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 2121210211201 - 2¹⁵ = 2121210178433 is a prime.

It is a super-3 number, since 3×2121210211201³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121210217201) 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, 905724795 + ... + 905727136.

It is an arithmetic number, because the mean of its divisors is an integer number (530755416076).

Almost surely, 2^{2121210211201} is an apocalyptic number.

It is an amenable number.

2121210211201 is a deficient number, since it is larger than the sum of its proper divisors (1811453103).

2121210211201 is a wasteful number, since it uses less digits than its factorization.

2121210211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811453102.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2121210211201 its reverse (1021120121212), we get a palindrome (3142330332413).

It can be divided in two parts, 21212 and 10211201, that multiplied together give a palindrome (216599995612).

The spelling of 2121210211201 in words is "two trillion, one hundred twenty-one billion, two hundred ten million, two hundred eleven thousand, two hundred one".