1211112453 has 16 divisors (see below), whose sum is σ = 1756019520. Its totient is φ = 739374336.

The previous prime is 1211112347. The next prime is 1211112457. The reversal of 1211112453 is 3542111121.

It is not a de Polignac number, because 1211112453 - 2¹² = 1211108357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211112457) 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, 319023 + ... + 322796.

It is an arithmetic number, because the mean of its divisors is an integer number (109751220).

Almost surely, 2^1211112453 is an apocalyptic number.

It is an amenable number.

1211112453 is a deficient number, since it is larger than the sum of its proper divisors (544907067).

1211112453 is a wasteful number, since it uses less digits than its factorization.

1211112453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641876.

The product of its digits is 240, while the sum is 21.

The square root of 1211112453 is about 34801.0409758099. The cubic root of 1211112453 is about 1065.9287021390.

Adding to 1211112453 its reverse (3542111121), we get a palindrome (4753223574).

The spelling of 1211112453 in words is "one billion, two hundred eleven million, one hundred twelve thousand, four hundred fifty-three".