11221011001973 has 2 divisors, whose sum is σ = 11221011001974. Its totient is φ = 11221011001972.

The previous prime is 11221011001943. The next prime is 11221011002017. The reversal of 11221011001973 is 37910011012211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10281045849649 + 939965152324 = 3206407^2 + 969518^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221011001973 - 2¹⁰ = 11221011000949 is a prime.

It is a super-2 number, since 2×11221011001973² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221011001943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610505500986 + 5610505500987.

It is an arithmetic number, because the mean of its divisors is an integer number (5610505500987).

Almost surely, 2^{11221011001973} is an apocalyptic number.

It is an amenable number.

11221011001973 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221011001973 is an equidigital number, since it uses as much as digits as its factorization.

11221011001973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 29.

The spelling of 11221011001973 in words is "eleven trillion, two hundred twenty-one billion, eleven million, one thousand, nine hundred seventy-three".