11961113401 has 2 divisors, whose sum is σ = 11961113402. Its totient is φ = 11961113400.

The previous prime is 11961113387. The next prime is 11961113513. The reversal of 11961113401 is 10431116911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9812883600 + 2148229801 = 99060^2 + 46349^2 .

It is an emirp because it is prime and its reverse (10431116911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11961113401 - 2⁵ = 11961113369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11961113401.

It is not a weakly prime, because it can be changed into another prime (11961113201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5980556700 + 5980556701.

It is an arithmetic number, because the mean of its divisors is an integer number (5980556701).

Almost surely, 2^11961113401 is an apocalyptic number.

It is an amenable number.

11961113401 is a deficient number, since it is larger than the sum of its proper divisors (1).

11961113401 is an equidigital number, since it uses as much as digits as its factorization.

11961113401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 11961113401 in words is "eleven billion, nine hundred sixty-one million, one hundred thirteen thousand, four hundred one".