10661212243 has 8 divisors (see below), whose sum is σ = 11733338736. Its totient is φ = 9606240000.

The previous prime is 10661212213. The next prime is 10661212273. The reversal of 10661212243 is 34221216601.

It is an interprime number because it is at equal distance from previous prime (10661212213) and next prime (10661212273).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10661212243 is a prime.

It is a super-2 number, since 2×10661212243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10661212213) 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, 4287258 + ... + 4289743.

It is an arithmetic number, because the mean of its divisors is an integer number (1466667342).

Almost surely, 2^10661212243 is an apocalyptic number.

10661212243 is a deficient number, since it is larger than the sum of its proper divisors (1072126493).

10661212243 is a wasteful number, since it uses less digits than its factorization.

10661212243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8577125.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 10661212243 its reverse (34221216601), we get a palindrome (44882428844).

The spelling of 10661212243 in words is "ten billion, six hundred sixty-one million, two hundred twelve thousand, two hundred forty-three".