61244531268221 has 16 divisors (see below), whose sum is σ = 71423355024000. Its totient is φ = 52494459089184.

The previous prime is 61244531268157. The next prime is 61244531268233. The reversal of 61244531268221 is 12286213544216.

It is not a de Polignac number, because 61244531268221 - 2⁶ = 61244531268157 is a prime.

It is a super-2 number, since 2×61244531268221² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61244531264221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20145470 + ... + 22985408.

It is an arithmetic number, because the mean of its divisors is an integer number (4463959689000).

Almost surely, 2^{61244531268221} is an apocalyptic number.

It is an amenable number.

61244531268221 is a deficient number, since it is larger than the sum of its proper divisors (10178823755779).

61244531268221 is an equidigital number, since it uses as much as digits as its factorization.

61244531268221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902833 (or 2902819 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The spelling of 61244531268221 in words is "sixty-one trillion, two hundred forty-four billion, five hundred thirty-one million, two hundred sixty-eight thousand, two hundred twenty-one".