61404524130121 has 4 divisors (see below), whose sum is σ = 61404543503044. Its totient is φ = 61404504757200.

The previous prime is 61404524130067. The next prime is 61404524130143. The reversal of 61404524130121 is 12103142540416.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41555815104400 + 19848709025721 = 6446380^2 + 4455189^2 .

It is a cyclic number.

It is not a de Polignac number, because 61404524130121 - 2⁹ = 61404524129609 is a prime.

It is a super-2 number, since 2×61404524130121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61404524130221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3697950 + ... + 11682631.

It is an arithmetic number, because the mean of its divisors is an integer number (15351135875761).

Almost surely, 2^{61404524130121} is an apocalyptic number.

It is an amenable number.

61404524130121 is a deficient number, since it is larger than the sum of its proper divisors (19372923).

61404524130121 is a wasteful number, since it uses less digits than its factorization.

61404524130121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19372922.

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 61404524130121 its reverse (12103142540416), we get a palindrome (73507666670537).

The spelling of 61404524130121 in words is "sixty-one trillion, four hundred four billion, five hundred twenty-four million, one hundred thirty thousand, one hundred twenty-one".