61200021042 has 16 divisors (see below), whose sum is σ = 136000046880. Its totient is φ = 20400006996.

The previous prime is 61200020957. The next prime is 61200021049. The reversal of 61200021042 is 24012000216.

61200021042 is a `hidden beast` number, since 612 + 0 + 0 + 0 + 2 + 10 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (61200021049) 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, 566666808 + ... + 566666915.

It is an arithmetic number, because the mean of its divisors is an integer number (8500002930).

Almost surely, 2^61200021042 is an apocalyptic number.

61200021042 is an abundant number, since it is smaller than the sum of its proper divisors (74800025838).

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

61200021042 is a wasteful number, since it uses less digits than its factorization.

61200021042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133333734 (or 1133333728 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 61200021042 its reverse (24012000216), we get a palindrome (85212021258).

The spelling of 61200021042 in words is "sixty-one billion, two hundred million, twenty-one thousand, forty-two".