22042243213 has 2 divisors, whose sum is σ = 22042243214. Its totient is φ = 22042243212.

The previous prime is 22042243151. The next prime is 22042243277. The reversal of 22042243213 is 31234224022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21014271369 + 1027971844 = 144963^2 + 32062^2 .

It is a cyclic number.

It is not a de Polignac number, because 22042243213 - 2²¹ = 22040146061 is a prime.

It is a super-2 number, since 2×22042243213² (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 (22042843213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11021121606 + 11021121607.

It is an arithmetic number, because the mean of its divisors is an integer number (11021121607).

Almost surely, 2^22042243213 is an apocalyptic number.

It is an amenable number.

22042243213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22042243213 is an equidigital number, since it uses as much as digits as its factorization.

22042243213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 22042243213 its reverse (31234224022), we get a palindrome (53276467235).

The spelling of 22042243213 in words is "twenty-two billion, forty-two million, two hundred forty-three thousand, two hundred thirteen".