2121201101121 has 8 divisors (see below), whose sum is σ = 2828278293120. Its totient is φ = 1414128988272.

The previous prime is 2121201101077. The next prime is 2121201101147. The reversal of 2121201101121 is 1211011021212.

It is a happy number.

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

It is not a de Polignac number, because 2121201101121 - 2³³ = 2112611166529 is a prime.

It is a super-2 number, since 2×2121201101121² (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 2121201101121.

It is not an unprimeable number, because it can be changed into a prime (2121201103121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155670 + ... + 2065583.

It is an arithmetic number, because the mean of its divisors is an integer number (353534786640).

Almost surely, 2^{2121201101121} is an apocalyptic number.

It is an amenable number.

2121201101121 is a deficient number, since it is larger than the sum of its proper divisors (707077191999).

2121201101121 is a wasteful number, since it uses less digits than its factorization.

2121201101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539575.

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

Adding to 2121201101121 its reverse (1211011021212), we get a palindrome (3332212122333).

The spelling of 2121201101121 in words is "two trillion, one hundred twenty-one billion, two hundred one million, one hundred one thousand, one hundred twenty-one".