2120121210705 has 32 divisors (see below), whose sum is σ = 3477248096256. Its totient is φ = 1102473349824.

The previous prime is 2120121210661. The next prime is 2120121210743. The reversal of 2120121210705 is 5070121210212.

It is a happy number.

It is not a de Polignac number, because 2120121210705 - 2¹¹ = 2120121208657 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2556057 + ... + 3282326.

It is an arithmetic number, because the mean of its divisors is an integer number (108664003008).

Almost surely, 2^{2120121210705} is an apocalyptic number.

It is an amenable number.

2120121210705 is a deficient number, since it is larger than the sum of its proper divisors (1357126885551).

2120121210705 is a wasteful number, since it uses less digits than its factorization.

2120121210705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5838997.

The product of its (nonzero) digits is 560, while the sum is 24.

Adding to 2120121210705 its reverse (5070121210212), we get a palindrome (7190242420917).

The spelling of 2120121210705 in words is "two trillion, one hundred twenty billion, one hundred twenty-one million, two hundred ten thousand, seven hundred five".