61212224141 has 4 divisors (see below), whose sum is σ = 61262031900. Its totient is φ = 61162416384.

The previous prime is 61212224137. The next prime is 61212224201. The reversal of 61212224141 is 14142221216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58027992100 + 3184232041 = 240890^2 + 56429^2 .

It is a cyclic number.

It is not a de Polignac number, because 61212224141 - 2² = 61212224137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61212224141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61212220141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24902036 + ... + 24904493.

It is an arithmetic number, because the mean of its divisors is an integer number (15315507975).

Almost surely, 2^61212224141 is an apocalyptic number.

It is an amenable number.

61212224141 is a deficient number, since it is larger than the sum of its proper divisors (49807759).

61212224141 is a wasteful number, since it uses less digits than its factorization.

61212224141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49807758.

The product of its digits is 1536, while the sum is 26.

Adding to 61212224141 its reverse (14142221216), we get a palindrome (75354445357).

The spelling of 61212224141 in words is "sixty-one billion, two hundred twelve million, two hundred twenty-four thousand, one hundred forty-one".