61004223021 has 16 divisors (see below), whose sum is σ = 93162241664. Its totient is φ = 34783271424.

The previous prime is 61004222987. The next prime is 61004223041. The reversal of 61004223021 is 12032240016.

It is not a de Polignac number, because 61004223021 - 2⁷ = 61004222893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61004223041) 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, 3168700 + ... + 3187893.

It is an arithmetic number, because the mean of its divisors is an integer number (5822640104).

Almost surely, 2^61004223021 is an apocalyptic number.

It is an amenable number.

61004223021 is a deficient number, since it is larger than the sum of its proper divisors (32158018643).

61004223021 is a wasteful number, since it uses less digits than its factorization.

61004223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357060.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 61004223021 its reverse (12032240016), we get a palindrome (73036463037).

The spelling of 61004223021 in words is "sixty-one billion, four million, two hundred twenty-three thousand, twenty-one".