11021012283681 has 27 divisors (see below), whose sum is σ = 15949752965913. Its totient is φ = 7333285527360.

The previous prime is 11021012283613. The next prime is 11021012283713. The reversal of 11021012283681 is 18638221012011.

It is a happy number.

The square root of 11021012283681 is 3319791.

It is a perfect power (a square), and thus also a powerful number.

11021012283681 is a `hidden beast` number, since 110 + 210 + 1 + 228 + 36 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 40298555025 + 10980713728656 = 200745^2 + 3313716^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11021012283681 is a prime.

It is a super-2 number, since 2×11021012283681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11021012288681) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9331931911 + ... + 9331933091.

Almost surely, 2^{11021012283681} is an apocalyptic number.

11021012283681 is the 3319791-st square number.

11021012283681 is the 1659896-th centered octagonal number.

It is an amenable number.

11021012283681 is a deficient number, since it is larger than the sum of its proper divisors (4928740682232).

11021012283681 is an frugal number, since it uses more digits than its factorization.

11021012283681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242 (or 2121 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

Multiplying 11021012283681 by its sum of digits (36), we get a square (396756442212516 = 19918746²).

Adding to 11021012283681 its reverse (18638221012011), we get a palindrome (29659233295692).

The spelling of 11021012283681 in words is "eleven trillion, twenty-one billion, twelve million, two hundred eighty-three thousand, six hundred eighty-one".