1011221021249 has 2 divisors, whose sum is σ = 1011221021250. Its totient is φ = 1011221021248.

The previous prime is 1011221021159. The next prime is 1011221021263. The reversal of 1011221021249 is 9421201221101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 962298217024 + 48922804225 = 980968^2 + 221185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011221021249 - 2⁸ = 1011221020993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1011221021269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505610510624 + 505610510625.

It is an arithmetic number, because the mean of its divisors is an integer number (505610510625).

Almost surely, 2^{1011221021249} is an apocalyptic number.

It is an amenable number.

1011221021249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011221021249 is an equidigital number, since it uses as much as digits as its factorization.

1011221021249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 1011221021249 in words is "one trillion, eleven billion, two hundred twenty-one million, twenty-one thousand, two hundred forty-nine".