11620225081 has 2 divisors, whose sum is σ = 11620225082. Its totient is φ = 11620225080.

The previous prime is 11620225031. The next prime is 11620225087. The reversal of 11620225081 is 18052202611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8990073856 + 2630151225 = 94816^2 + 51285^2 .

It is a cyclic number.

It is not a de Polignac number, because 11620225081 - 2¹¹ = 11620223033 is a prime.

It is a super-2 number, since 2×11620225081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11620225087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5810112540 + 5810112541.

It is an arithmetic number, because the mean of its divisors is an integer number (5810112541).

Almost surely, 2^11620225081 is an apocalyptic number.

It is an amenable number.

11620225081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11620225081 is an equidigital number, since it uses as much as digits as its factorization.

11620225081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 11620225081 its reverse (18052202611), we get a palindrome (29672427692).

The spelling of 11620225081 in words is "eleven billion, six hundred twenty million, two hundred twenty-five thousand, eighty-one".