10661212272 has 40 divisors (see below), whose sum is σ = 27554022144. Its totient is φ = 3552117184.

The previous prime is 10661212213. The next prime is 10661212273. The reversal of 10661212272 is 27221216601.

10661212272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10661212272² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661212273) 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, 58153 + ... + 157175.

Almost surely, 2^10661212272 is an apocalyptic number.

10661212272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10661212272 is an abundant number, since it is smaller than the sum of its proper divisors (16892809872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10661212272 is a wasteful number, since it uses less digits than its factorization.

10661212272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101277 (or 101271 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

Adding to 10661212272 its reverse (27221216601), we get a palindrome (37882428873).

The spelling of 10661212272 in words is "ten billion, six hundred sixty-one million, two hundred twelve thousand, two hundred seventy-two".