11520321420061 has 6 divisors (see below), whose sum is σ = 12158566374462. Its totient is φ = 10913988713400.

The previous prime is 11520321420019. The next prime is 11520321420077. The reversal of 11520321420061 is 16002412302511.

It can be written as a sum of positive squares in only one way, i.e., 10896369931225 + 623951488836 = 3300965^2 + 789906^2 .

It is not a de Polignac number, because 11520321420061 - 2⁹ = 11520321419549 is a prime.

It is a super-2 number, since 2×11520321420061² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520321420761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15956123490 + ... + 15956124211.

It is an arithmetic number, because the mean of its divisors is an integer number (2026427729077).

Almost surely, 2^{11520321420061} is an apocalyptic number.

It is an amenable number.

11520321420061 is a deficient number, since it is larger than the sum of its proper divisors (638244954401).

11520321420061 is an equidigital number, since it uses as much as digits as its factorization.

11520321420061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31912247739 (or 31912247720 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 11520321420061 its reverse (16002412302511), we get a palindrome (27522733722572).

The spelling of 11520321420061 in words is "eleven trillion, five hundred twenty billion, three hundred twenty-one million, four hundred twenty thousand, sixty-one".