61243211121 has 8 divisors (see below), whose sum is σ = 81662791584. Its totient is φ = 40826219040.

The previous prime is 61243211111. The next prime is 61243211131. The reversal of 61243211121 is 12111234216.

It is an interprime number because it is at equal distance from previous prime (61243211111) and next prime (61243211131).

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

It is not a de Polignac number, because 61243211121 - 2⁷ = 61243210993 is a prime.

It is a super-2 number, since 2×61243211121² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61243211091 and 61243211100.

It is not an unprimeable number, because it can be changed into a prime (61243211101) 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, 591196 + ... + 687021.

It is an arithmetic number, because the mean of its divisors is an integer number (10207848948).

Almost surely, 2^61243211121 is an apocalyptic number.

It is an amenable number.

61243211121 is a deficient number, since it is larger than the sum of its proper divisors (20419580463).

61243211121 is a wasteful number, since it uses less digits than its factorization.

61243211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294191.

The product of its digits is 576, while the sum is 24.

Adding to 61243211121 its reverse (12111234216), we get a palindrome (73354445337).

The spelling of 61243211121 in words is "sixty-one billion, two hundred forty-three million, two hundred eleven thousand, one hundred twenty-one".