2120212608705 has 80 divisors (see below), whose sum is σ = 3873232883520. Its totient is φ = 1109202636672.

The previous prime is 2120212608697. The next prime is 2120212608763. The reversal of 2120212608705 is 5078062120212.

It is a happy number.

2120212608705 is a `hidden beast` number, since 2 + 1 + 20 + 21 + 2 + 608 + 7 + 0 + 5 = 666.

It is not a de Polignac number, because 2120212608705 - 2³ = 2120212608697 is a prime.

It is a super-2 number, since 2×2120212608705² (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 2120212608705.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 142069374 + ... + 142084296.

It is an arithmetic number, because the mean of its divisors is an integer number (48415411044).

Almost surely, 2^{2120212608705} is an apocalyptic number.

It is an amenable number.

2120212608705 is a deficient number, since it is larger than the sum of its proper divisors (1753020274815).

2120212608705 is a wasteful number, since it uses less digits than its factorization.

2120212608705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21612 (or 21603 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

Adding to 2120212608705 its reverse (5078062120212), we get a palindrome (7198274728917).

The spelling of 2120212608705 in words is "two trillion, one hundred twenty billion, two hundred twelve million, six hundred eight thousand, seven hundred five".