11110677821 has 2 divisors, whose sum is σ = 11110677822. Its totient is φ = 11110677820.

The previous prime is 11110677817. The next prime is 11110677829. The reversal of 11110677821 is 12877601111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9080184100 + 2030493721 = 95290^2 + 45061^2 .

It is a cyclic number.

It is not a de Polignac number, because 11110677821 - 2² = 11110677817 is a prime.

It is a super-2 number, since 2×11110677821² (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 (11110677829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555338910 + 5555338911.

It is an arithmetic number, because the mean of its divisors is an integer number (5555338911).

Almost surely, 2^11110677821 is an apocalyptic number.

It is an amenable number.

11110677821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11110677821 is an equidigital number, since it uses as much as digits as its factorization.

11110677821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 35.

The spelling of 11110677821 in words is "eleven billion, one hundred ten million, six hundred seventy-seven thousand, eight hundred twenty-one".