1021272011 has 2 divisors, whose sum is σ = 1021272012. Its totient is φ = 1021272010.

The previous prime is 1021271989. The next prime is 1021272019. The reversal of 1021272011 is 1102721201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021272011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021272019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510636005 + 510636006.

It is an arithmetic number, because the mean of its divisors is an integer number (510636006).

Almost surely, 2^1021272011 is an apocalyptic number.

1021272011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021272011 is an equidigital number, since it uses as much as digits as its factorization.

1021272011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 1021272011 is about 31957.3467453104. The cubic root of 1021272011 is about 1007.0409786006.

Adding to 1021272011 its reverse (1102721201), we get a palindrome (2123993212).

The spelling of 1021272011 in words is "one billion, twenty-one million, two hundred seventy-two thousand, eleven".