61121250042 has 32 divisors (see below), whose sum is σ = 127598284800. Its totient is φ = 19481687280.

The previous prime is 61121250041. The next prime is 61121250079. The reversal of 61121250042 is 24005212116.

It is a junction number, because it is equal to n+sod(n) for n = 61121249994 and 61121250021.

It is not an unprimeable number, because it can be changed into a prime (61121250041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370959 + ... + 509757.

It is an arithmetic number, because the mean of its divisors is an integer number (3987446400).

Almost surely, 2^61121250042 is an apocalyptic number.

61121250042 is an abundant number, since it is smaller than the sum of its proper divisors (66477034758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61121250042 is a wasteful number, since it uses less digits than its factorization.

61121250042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142018.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 61121250042 its reverse (24005212116), we get a palindrome (85126462158).

The spelling of 61121250042 in words is "sixty-one billion, one hundred twenty-one million, two hundred fifty thousand, forty-two".