13011222421 has 2 divisors, whose sum is σ = 13011222422. Its totient is φ = 13011222420.

The previous prime is 13011222409. The next prime is 13011222491. The reversal of 13011222421 is 12422211031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8107021521 + 4904200900 = 90039^2 + 70030^2 .

It is an emirp because it is prime and its reverse (12422211031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13011222421 - 2⁷ = 13011222293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13011222491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6505611210 + 6505611211.

It is an arithmetic number, because the mean of its divisors is an integer number (6505611211).

Almost surely, 2^13011222421 is an apocalyptic number.

It is an amenable number.

13011222421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13011222421 is an equidigital number, since it uses as much as digits as its factorization.

13011222421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 13011222421 its reverse (12422211031), we get a palindrome (25433433452).

The spelling of 13011222421 in words is "thirteen billion, eleven million, two hundred twenty-two thousand, four hundred twenty-one".