2121202020201 has 16 divisors (see below), whose sum is σ = 3105036896448. Its totient is φ = 1277388590400.

The previous prime is 2121202020187. The next prime is 2121202020209. The reversal of 2121202020201 is 1020202021212.

It is not a de Polignac number, because 2121202020201 - 2⁹ = 2121202019689 is a prime.

It is a super-2 number, since 2×2121202020201² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121202020209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204704530 + ... + 204714891.

It is an arithmetic number, because the mean of its divisors is an integer number (194064806028).

Almost surely, 2^{2121202020201} is an apocalyptic number.

It is an amenable number.

2121202020201 is a deficient number, since it is larger than the sum of its proper divisors (983834876247).

2121202020201 is a wasteful number, since it uses less digits than its factorization.

2121202020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409419592.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2121202020201 its reverse (1020202021212), we get a palindrome (3141404041413).

The spelling of 2121202020201 in words is "two trillion, one hundred twenty-one billion, two hundred two million, twenty thousand, two hundred one".