21222030293 has 2 divisors, whose sum is σ = 21222030294. Its totient is φ = 21222030292.

The previous prime is 21222030233. The next prime is 21222030317. The reversal of 21222030293 is 39203022212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16425498244 + 4796532049 = 128162^2 + 69257^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222030293 - 2²⁴ = 21205253077 is a prime.

It is a super-3 number, since 3×21222030293³ (a number of 32 digits) contains 333 as substring.

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 (21222030233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611015146 + 10611015147.

It is an arithmetic number, because the mean of its divisors is an integer number (10611015147).

Almost surely, 2^21222030293 is an apocalyptic number.

It is an amenable number.

21222030293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222030293 is an equidigital number, since it uses as much as digits as its factorization.

21222030293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 21222030293 in words is "twenty-one billion, two hundred twenty-two million, thirty thousand, two hundred ninety-three".