2111520606245 has 8 divisors (see below), whose sum is σ = 2682873240984. Its totient is φ = 1589850809344.

The previous prime is 2111520606199. The next prime is 2111520606271. The reversal of 2111520606245 is 5426060251112.

It can be written as a sum of positive squares in 4 ways, for example, as 15575289601 + 2095945316644 = 124801^2 + 1447738^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2111520606245 - 2¹⁰ = 2111520605221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12420709364 + ... + 12420709533.

It is an arithmetic number, because the mean of its divisors is an integer number (335359155123).

Almost surely, 2^{2111520606245} is an apocalyptic number.

It is an amenable number.

2111520606245 is a deficient number, since it is larger than the sum of its proper divisors (571352634739).

2111520606245 is a wasteful number, since it uses less digits than its factorization.

2111520606245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24841418919.

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 2111520606245 its reverse (5426060251112), we get a palindrome (7537580857357).

The spelling of 2111520606245 in words is "two trillion, one hundred eleven billion, five hundred twenty million, six hundred six thousand, two hundred forty-five".