11725677421 has 2 divisors, whose sum is σ = 11725677422. Its totient is φ = 11725677420.

The previous prime is 11725677413. The next prime is 11725677479. The reversal of 11725677421 is 12477652711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9513856521 + 2211820900 = 97539^2 + 47030^2 .

It is an emirp because it is prime and its reverse (12477652711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11725677421 - 2³ = 11725677413 is a prime.

It is a super-2 number, since 2×11725677421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11725677401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5862838710 + 5862838711.

It is an arithmetic number, because the mean of its divisors is an integer number (5862838711).

Almost surely, 2^11725677421 is an apocalyptic number.

It is an amenable number.

11725677421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11725677421 is an equidigital number, since it uses as much as digits as its factorization.

11725677421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164640, while the sum is 43.

The spelling of 11725677421 in words is "eleven billion, seven hundred twenty-five million, six hundred seventy-seven thousand, four hundred twenty-one".