61042021120 has 72 divisors (see below), whose sum is σ = 151256694960. Its totient is φ = 23574835200.

The previous prime is 61042021097. The next prime is 61042021121. The reversal of 61042021120 is 2112024016.

It is a super-2 number, since 2×61042021120² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61042021121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785106 + ... + 859345.

It is an arithmetic number, because the mean of its divisors is an integer number (2100787430).

Almost surely, 2^61042021120 is an apocalyptic number.

It is an amenable number.

61042021120 is an abundant number, since it is smaller than the sum of its proper divisors (90214673840).

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

61042021120 is a wasteful number, since it uses less digits than its factorization.

61042021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644501 (or 1644487 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 61042021120 its reverse (2112024016), we get a palindrome (63154045136).

The spelling of 61042021120 in words is "sixty-one billion, forty-two million, twenty-one thousand, one hundred twenty".