11515151230061 has 2 divisors, whose sum is σ = 11515151230062. Its totient is φ = 11515151230060.

The previous prime is 11515151230057. The next prime is 11515151230081. The reversal of 11515151230061 is 16003215151511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5789750316100 + 5725400913961 = 2406190^2 + 2392781^2 .

It is a cyclic number.

It is not a de Polignac number, because 11515151230061 - 2² = 11515151230057 is a prime.

It is a super-2 number, since 2×11515151230061² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515151230031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757575615030 + 5757575615031.

It is an arithmetic number, because the mean of its divisors is an integer number (5757575615031).

Almost surely, 2^{11515151230061} is an apocalyptic number.

It is an amenable number.

11515151230061 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515151230061 is an equidigital number, since it uses as much as digits as its factorization.

11515151230061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 32.

Adding to 11515151230061 its reverse (16003215151511), we get a palindrome (27518366381572).

The spelling of 11515151230061 in words is "eleven trillion, five hundred fifteen billion, one hundred fifty-one million, two hundred thirty thousand, sixty-one".