2111244235545 has 16 divisors (see below), whose sum is σ = 3576696117120. Its totient is φ = 1059761812224.

The previous prime is 2111244235543. The next prime is 2111244235553. The reversal of 2111244235545 is 5455324421112.

It is not a de Polignac number, because 2111244235545 - 2¹ = 2111244235543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111244235543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4139694325 + ... + 4139694834.

It is an arithmetic number, because the mean of its divisors is an integer number (223543507320).

Almost surely, 2^{2111244235545} is an apocalyptic number.

It is an amenable number.

2111244235545 is a deficient number, since it is larger than the sum of its proper divisors (1465451881575).

2111244235545 is a wasteful number, since it uses less digits than its factorization.

2111244235545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8279389184.

The product of its digits is 192000, while the sum is 39.

Adding to 2111244235545 its reverse (5455324421112), we get a palindrome (7566568656657).

The spelling of 2111244235545 in words is "two trillion, one hundred eleven billion, two hundred forty-four million, two hundred thirty-five thousand, five hundred forty-five".