1321022011 has 2 divisors, whose sum is σ = 1321022012. Its totient is φ = 1321022010.

The previous prime is 1321021981. The next prime is 1321022029. The reversal of 1321022011 is 1102201231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321022011 - 2¹¹ = 1321019963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321021982 and 1321022000.

It is not a weakly prime, because it can be changed into another prime (1321022081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660511005 + 660511006.

It is an arithmetic number, because the mean of its divisors is an integer number (660511006).

Almost surely, 2^1321022011 is an apocalyptic number.

1321022011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321022011 is an equidigital number, since it uses as much as digits as its factorization.

1321022011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1321022011 is about 36345.8664912532. The cubic root of 1321022011 is about 1097.2443451610.

Adding to 1321022011 its reverse (1102201231), we get a palindrome (2423223242).

The spelling of 1321022011 in words is "one billion, three hundred twenty-one million, twenty-two thousand, eleven".