1011320221237 has 2 divisors, whose sum is σ = 1011320221238. Its totient is φ = 1011320221236.

The previous prime is 1011320221231. The next prime is 1011320221313. The reversal of 1011320221237 is 7321220231101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800785157956 + 210535063281 = 894866^2 + 458841^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011320221237 - 2¹⁵ = 1011320188469 is a prime.

It is a super-3 number, since 3×1011320221237³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011320221231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505660110618 + 505660110619.

It is an arithmetic number, because the mean of its divisors is an integer number (505660110619).

Almost surely, 2^{1011320221237} is an apocalyptic number.

It is an amenable number.

1011320221237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011320221237 is an equidigital number, since it uses as much as digits as its factorization.

1011320221237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 1011320221237 its reverse (7321220231101), we get a palindrome (8332540452338).

The spelling of 1011320221237 in words is "one trillion, eleven billion, three hundred twenty million, two hundred twenty-one thousand, two hundred thirty-seven".