2120211220121 has 8 divisors (see below), whose sum is σ = 2212438885440. Its totient is φ = 2027987268912.

The previous prime is 2120211220109. The next prime is 2120211220129. The reversal of 2120211220121 is 1210221120212.

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

It is a cyclic number.

It is not a de Polignac number, because 2120211220121 - 2²² = 2120207025817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120211220121.

It is not an unprimeable number, because it can be changed into a prime (2120211220129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270995 + ... + 2076983.

It is an arithmetic number, because the mean of its divisors is an integer number (276554860680).

Almost surely, 2^{2120211220121} is an apocalyptic number.

It is an amenable number.

2120211220121 is a deficient number, since it is larger than the sum of its proper divisors (92227665319).

2120211220121 is a wasteful number, since it uses less digits than its factorization.

2120211220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857055.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2120211220121 its reverse (1210221120212), we get a palindrome (3330432340333).

Subtracting from 2120211220121 its reverse (1210221120212), we obtain a palindrome (909990099909).

The spelling of 2120211220121 in words is "two trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty thousand, one hundred twenty-one".