11221421249 has 2 divisors, whose sum is σ = 11221421250. Its totient is φ = 11221421248.

The previous prime is 11221421219. The next prime is 11221421273. The reversal of 11221421249 is 94212412211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10270809025 + 950612224 = 101345^2 + 30832^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221421249 - 2¹² = 11221417153 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221421209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610710624 + 5610710625.

It is an arithmetic number, because the mean of its divisors is an integer number (5610710625).

Almost surely, 2^11221421249 is an apocalyptic number.

It is an amenable number.

11221421249 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221421249 is an equidigital number, since it uses as much as digits as its factorization.

11221421249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The spelling of 11221421249 in words is "eleven billion, two hundred twenty-one million, four hundred twenty-one thousand, two hundred forty-nine".