22011321973 has 2 divisors, whose sum is σ = 22011321974. Its totient is φ = 22011321972.

The previous prime is 22011321967. The next prime is 22011322037. The reversal of 22011321973 is 37912311022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12405949924 + 9605372049 = 111382^2 + 98007^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011321973 - 2²¹ = 22009224821 is a prime.

It is a super-2 number, since 2×22011321973² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22011321373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005660986 + 11005660987.

It is an arithmetic number, because the mean of its divisors is an integer number (11005660987).

Almost surely, 2^22011321973 is an apocalyptic number.

It is an amenable number.

22011321973 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011321973 is an equidigital number, since it uses as much as digits as its factorization.

22011321973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

Adding to 22011321973 its reverse (37912311022), we get a palindrome (59923632995).

The spelling of 22011321973 in words is "twenty-two billion, eleven million, three hundred twenty-one thousand, nine hundred seventy-three".