2021200112121 has 8 divisors (see below), whose sum is σ = 2740610321760. Its totient is φ = 1324628321952.

The previous prime is 2021200112101. The next prime is 2021200112143. The reversal of 2021200112121 is 1212110021202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2021200112121 - 2¹¹ = 2021200110073 is a prime.

It is a super-2 number, since 2×2021200112121² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021200112121.

It is not an unprimeable number, because it can be changed into a prime (2021200112101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5709604660 + ... + 5709605013.

It is an arithmetic number, because the mean of its divisors is an integer number (342576290220).

Almost surely, 2^{2021200112121} is an apocalyptic number.

It is an amenable number.

2021200112121 is a deficient number, since it is larger than the sum of its proper divisors (719410209639).

2021200112121 is a wasteful number, since it uses less digits than its factorization.

2021200112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11419209735.

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

Adding to 2021200112121 its reverse (1212110021202), we get a palindrome (3233310133323).

The spelling of 2021200112121 in words is "two trillion, twenty-one billion, two hundred million, one hundred twelve thousand, one hundred twenty-one".