11220931 has 2 divisors, whose sum is σ = 11220932. Its totient is φ = 11220930.

The previous prime is 11220917. The next prime is 11220991. The reversal of 11220931 is 13902211.

It is a weak prime.

It is an emirp because it is prime and its reverse (13902211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11220931 - 2⁵ = 11220899 is a prime.

It is a super-2 number, since 2×11220931² = 251818585013522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220899 and 11220908.

It is not a weakly prime, because it can be changed into another prime (11220991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610465 + 5610466.

It is an arithmetic number, because the mean of its divisors is an integer number (5610466).

Almost surely, 2^11220931 is an apocalyptic number.

11220931 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220931 is an equidigital number, since it uses as much as digits as its factorization.

11220931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 11220931 is about 3349.7658127099. The cubic root of 11220931 is about 223.8770783384.

The spelling of 11220931 in words is "eleven million, two hundred twenty thousand, nine hundred thirty-one".