61221138103 has 8 divisors (see below), whose sum is σ = 61797358368. Its totient is φ = 60647473824.

The previous prime is 61221138073. The next prime is 61221138107. The reversal of 61221138103 is 30183112216.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61221138103 - 2⁹ = 61221137591 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 (61221138107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590851 + ... + 686692.

It is an arithmetic number, because the mean of its divisors is an integer number (7724669796).

Almost surely, 2^61221138103 is an apocalyptic number.

61221138103 is a deficient number, since it is larger than the sum of its proper divisors (576220265).

61221138103 is a wasteful number, since it uses less digits than its factorization.

61221138103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277993.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 61221138103 in words is "sixty-one billion, two hundred twenty-one million, one hundred thirty-eight thousand, one hundred three".