61231542136101 has 12 divisors (see below), whose sum is σ = 88445733830220. Its totient is φ = 40820948259840.

The previous prime is 61231542136099. The next prime is 61231542136109. The reversal of 61231542136101 is 10163124513216.

61231542136101 is a `hidden beast` number, since 6 + 1 + 2 + 3 + 1 + 542 + 1 + 3 + 6 + 101 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13445429573601 + 47786112562500 = 3666801^2 + 6912750^2 .

It is not a de Polignac number, because 61231542136101 - 2¹ = 61231542136099 is a prime.

It is a super-2 number, since 2×61231542136101² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61231542136109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1592220 + ... + 11180261.

It is an arithmetic number, because the mean of its divisors is an integer number (7370477819185).

Almost surely, 2^{61231542136101} is an apocalyptic number.

It is an amenable number.

61231542136101 is a deficient number, since it is larger than the sum of its proper divisors (27214191694119).

61231542136101 is a wasteful number, since it uses less digits than its factorization.

61231542136101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13305156 (or 13305153 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 61231542136101 its reverse (10163124513216), we get a palindrome (71394666649317).

The spelling of 61231542136101 in words is "sixty-one trillion, two hundred thirty-one billion, five hundred forty-two million, one hundred thirty-six thousand, one hundred one".