2120768978063 has 4 divisors (see below), whose sum is σ = 2122764058128. Its totient is φ = 2118773898000.

The previous prime is 2120768977997. The next prime is 2120768978071. The reversal of 2120768978063 is 3608798670212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2120768978063 - 2⁸ = 2120768977807 is a prime.

It is a super-2 number, since 2×2120768978063² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120768977993 and 2120768978011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120768978863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997538438 + ... + 997540563.

It is an arithmetic number, because the mean of its divisors is an integer number (530691014532).

Almost surely, 2^{2120768978063} is an apocalyptic number.

2120768978063 is a deficient number, since it is larger than the sum of its proper divisors (1995080065).

2120768978063 is a wasteful number, since it uses less digits than its factorization.

2120768978063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995080064.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 2120768978063 in words is "two trillion, one hundred twenty billion, seven hundred sixty-eight million, nine hundred seventy-eight thousand, sixty-three".