11221656947 has 2 divisors, whose sum is σ = 11221656948. Its totient is φ = 11221656946.

The previous prime is 11221656931. The next prime is 11221657009. The reversal of 11221656947 is 74965612211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11221656947 - 2⁴ = 11221656931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221656898 and 11221656907.

It is not a weakly prime, because it can be changed into another prime (11221656917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610828473 + 5610828474.

It is an arithmetic number, because the mean of its divisors is an integer number (5610828474).

Almost surely, 2^11221656947 is an apocalyptic number.

11221656947 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221656947 is an equidigital number, since it uses as much as digits as its factorization.

11221656947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The spelling of 11221656947 in words is "eleven billion, two hundred twenty-one million, six hundred fifty-six thousand, nine hundred forty-seven".