2136540121234 has 16 divisors (see below), whose sum is σ = 3207301245720. Its totient is φ = 1067439824640.

The previous prime is 2136540121231. The next prime is 2136540121259. The reversal of 2136540121234 is 4321210456312.

It can be written as a sum of positive squares in 4 ways, for example, as 1070386814025 + 1066153307209 = 1034595^2 + 1032547^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2136540121234.

It is not an unprimeable number, because it can be changed into a prime (2136540121231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55543152 + ... + 55581604.

Almost surely, 2^{2136540121234} is an apocalyptic number.

2136540121234 is a deficient number, since it is larger than the sum of its proper divisors (1070761124486).

2136540121234 is a wasteful number, since it uses less digits than its factorization.

2136540121234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59325.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 2136540121234 its reverse (4321210456312), we get a palindrome (6457750577546).

The spelling of 2136540121234 in words is "two trillion, one hundred thirty-six billion, five hundred forty million, one hundred twenty-one thousand, two hundred thirty-four".