61216032021 has 8 divisors (see below), whose sum is σ = 81627822240. Its totient is φ = 40807464912.

The previous prime is 61216031957. The next prime is 61216032029. The reversal of 61216032021 is 12023061216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61216032021 - 2⁶ = 61216031957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61216031982 and 61216032000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61216032029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761106 + ... + 837683.

It is an arithmetic number, because the mean of its divisors is an integer number (10203477780).

Almost surely, 2^61216032021 is an apocalyptic number.

It is an amenable number.

61216032021 is a deficient number, since it is larger than the sum of its proper divisors (20411790219).

61216032021 is a wasteful number, since it uses less digits than its factorization.

61216032021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611555.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 61216032021 its reverse (12023061216), we get a palindrome (73239093237).

The spelling of 61216032021 in words is "sixty-one billion, two hundred sixteen million, thirty-two thousand, twenty-one".