2120131052645 has 8 divisors (see below), whose sum is σ = 2550032917656. Its totient is φ = 1692187739136.

The previous prime is 2120131052573. The next prime is 2120131052647. The reversal of 2120131052645 is 5462501310212.

It can be written as a sum of positive squares in 4 ways, for example, as 288160681636 + 1831970371009 = 536806^2 + 1353503^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120131052645 is a prime.

It is a super-2 number, since 2×2120131052645² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120131052647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489635492 + ... + 489639821.

It is an arithmetic number, because the mean of its divisors is an integer number (318754114707).

Almost surely, 2^{2120131052645} is an apocalyptic number.

It is an amenable number.

2120131052645 is a deficient number, since it is larger than the sum of its proper divisors (429901865011).

2120131052645 is an equidigital number, since it uses as much as digits as its factorization.

2120131052645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979275751.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 2120131052645 its reverse (5462501310212), we get a palindrome (7582632362857).

The spelling of 2120131052645 in words is "two trillion, one hundred twenty billion, one hundred thirty-one million, fifty-two thousand, six hundred forty-five".