61121113 has 2 divisors, whose sum is σ = 61121114. Its totient is φ = 61121112.

The previous prime is 61121107. The next prime is 61121129. The reversal of 61121113 is 31112116.

It is an a-pointer prime, because the next prime (61121129) can be obtained adding 61121113 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39841344 + 21279769 = 6312^2 + 4613^2 .

It is a cyclic number.

It is not a de Polignac number, because 61121113 - 2⁹ = 61120601 is a prime.

It is not a weakly prime, because it can be changed into another prime (61121173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30560556 + 30560557.

It is an arithmetic number, because the mean of its divisors is an integer number (30560557).

Almost surely, 2^61121113 is an apocalyptic number.

It is an amenable number.

61121113 is a deficient number, since it is larger than the sum of its proper divisors (1).

61121113 is an equidigital number, since it uses as much as digits as its factorization.

61121113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 16.

The square root of 61121113 is about 7817.9992964952. Note that the first 3 decimals coincide. The cubic root of 61121113 is about 393.9100712070.

Adding to 61121113 its reverse (31112116), we get a palindrome (92233229).

It can be divided in two parts, 6112 and 1113, that added together give a square (7225 = 85²).

The spelling of 61121113 in words is "sixty-one million, one hundred twenty-one thousand, one hundred thirteen".