3611221061 has 24 divisors (see below), whose sum is σ = 4264110720. Its totient is φ = 3048881472.

The previous prime is 3611221057. The next prime is 3611221079. The reversal of 3611221061 is 1601221163.

It is not a de Polignac number, because 3611221061 - 2² = 3611221057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3611221661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2178545 + ... + 2180201.

It is an arithmetic number, because the mean of its divisors is an integer number (177671280).

Almost surely, 2^3611221061 is an apocalyptic number.

It is an amenable number.

3611221061 is a deficient number, since it is larger than the sum of its proper divisors (652889659).

3611221061 is a wasteful number, since it uses less digits than its factorization.

3611221061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313 (or 2306 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 3611221061 is about 60093.4360891437. The cubic root of 3611221061 is about 1534.2095844680.

The spelling of 3611221061 in words is "three billion, six hundred eleven million, two hundred twenty-one thousand, sixty-one".