1211140534513 has 16 divisors (see below), whose sum is σ = 1490753326720. Its totient is φ = 958188652416.

The previous prime is 1211140534489. The next prime is 1211140534523. The reversal of 1211140534513 is 3154350411121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1211140534513 - 2⁵ = 1211140534481 is a prime.

It is a super-2 number, since 2×1211140534513² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211140534523) 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, 631318 + ... + 1679536.

It is an arithmetic number, because the mean of its divisors is an integer number (93172082920).

Almost surely, 2^{1211140534513} is an apocalyptic number.

1211140534513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1211140534513 is a deficient number, since it is larger than the sum of its proper divisors (279612792207).

1211140534513 is a wasteful number, since it uses less digits than its factorization.

1211140534513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060936.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 1211140534513 its reverse (3154350411121), we get a palindrome (4365490945634).

The spelling of 1211140534513 in words is "one trillion, two hundred eleven billion, one hundred forty million, five hundred thirty-four thousand, five hundred thirteen".