61121112061 has 16 divisors (see below), whose sum is σ = 65680481664. Its totient is φ = 56674960384.

The previous prime is 61121111999. The next prime is 61121112083. The reversal of 61121112061 is 16021112116.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61121112061 - 2⁹ = 61121111549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61121113061) 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, 225546 + ... + 416068.

It is an arithmetic number, because the mean of its divisors is an integer number (4105030104).

Almost surely, 2^61121112061 is an apocalyptic number.

It is an amenable number.

61121112061 is a deficient number, since it is larger than the sum of its proper divisors (4559369603).

61121112061 is a wasteful number, since it uses less digits than its factorization.

61121112061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190820.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 61121112061 its reverse (16021112116), we get a palindrome (77142224177).

The spelling of 61121112061 in words is "sixty-one billion, one hundred twenty-one million, one hundred twelve thousand, sixty-one".