2121121102121 has 8 divisors (see below), whose sum is σ = 2424218082240. Its totient is φ = 1818044041968.

The previous prime is 2121121102109. The next prime is 2121121102141. The reversal of 2121121102121 is 1212011211212.

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

It is not a de Polignac number, because 2121121102121 - 2¹⁰ = 2121121101097 is a prime.

It is a Duffinian number.

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 2121121102121.

It is not an unprimeable number, because it can be changed into a prime (2121121102141) 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, 4751111 + ... + 5178348.

It is an arithmetic number, because the mean of its divisors is an integer number (303027260280).

Almost surely, 2^{2121121102121} is an apocalyptic number.

It is an amenable number.

2121121102121 is a deficient number, since it is larger than the sum of its proper divisors (303096980119).

2121121102121 is an equidigital number, since it uses as much as digits as its factorization.

2121121102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9959983.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2121121102121 its reverse (1212011211212), we get a palindrome (3333132313333).

The spelling of 2121121102121 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, one hundred twenty-one".