22011001973 has 2 divisors, whose sum is σ = 22011001974. Its totient is φ = 22011001972.

The previous prime is 22011001967. The next prime is 22011002009. The reversal of 22011001973 is 37910011022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21816176209 + 194825764 = 147703^2 + 13958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22011001973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22011001963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005500986 + 11005500987.

It is an arithmetic number, because the mean of its divisors is an integer number (11005500987).

Almost surely, 2^22011001973 is an apocalyptic number.

It is an amenable number.

22011001973 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011001973 is an equidigital number, since it uses as much as digits as its factorization.

22011001973 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 26.

Adding to 22011001973 its reverse (37910011022), we get a palindrome (59921012995).

The spelling of 22011001973 in words is "twenty-two billion, eleven million, one thousand, nine hundred seventy-three".