2120012121 has 8 divisors (see below), whose sum is σ = 2829346240. Its totient is φ = 1412009712.

The previous prime is 2120012107. The next prime is 2120012123. The reversal of 2120012121 is 1212100212.

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

It is not a de Polignac number, because 2120012121 - 2¹⁰ = 2120011097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120012097 and 2120012106.

It is not an unprimeable number, because it can be changed into a prime (2120012123) 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, 329206 + ... + 335583.

It is an arithmetic number, because the mean of its divisors is an integer number (353668280).

Almost surely, 2^2120012121 is an apocalyptic number.

It is an amenable number.

2120012121 is a deficient number, since it is larger than the sum of its proper divisors (709334119).

2120012121 is a wasteful number, since it uses less digits than its factorization.

2120012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665855.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2120012121 is about 46043.5893583461. The cubic root of 2120012121 is about 1284.6341059814.

Adding to 2120012121 its reverse (1212100212), we get a palindrome (3332112333).

The spelling of 2120012121 in words is "two billion, one hundred twenty million, twelve thousand, one hundred twenty-one".