61121123 has 8 divisors (see below), whose sum is σ = 69924192. Its totient is φ = 52335936.

The previous prime is 61121113. The next prime is 61121129. The reversal of 61121123 is 32112116.

It is a Cunningham number, because it is equal to 7818²-1.

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 61121123 - 2⁴ = 61121107 is a prime.

It is a super-2 number, since 2×61121123² = 7471583353562258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61121129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3911 + ... + 11727.

It is an arithmetic number, because the mean of its divisors is an integer number (8740524).

Almost surely, 2^61121123 is an apocalyptic number.

61121123 is a deficient number, since it is larger than the sum of its proper divisors (8803069).

61121123 is a wasteful number, since it uses less digits than its factorization.

61121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8941.

The product of its digits is 72, while the sum is 17.

The square root of 61121123 is about 7817.9999360450. Note that the first 4 decimals coincide. The cubic root of 61121123 is about 393.9100926895.

Adding to 61121123 its reverse (32112116), we get a palindrome (93233239).

The spelling of 61121123 in words is "sixty-one million, one hundred twenty-one thousand, one hundred twenty-three".