1106521621 has 2 divisors, whose sum is σ = 1106521622. Its totient is φ = 1106521620.

The previous prime is 1106521613. The next prime is 1106521627. The reversal of 1106521621 is 1261256011.

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., 870899121 + 235622500 = 29511^2 + 15350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1106521621 - 2³ = 1106521613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1106521627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 553260810 + 553260811.

It is an arithmetic number, because the mean of its divisors is an integer number (553260811).

Almost surely, 2^1106521621 is an apocalyptic number.

It is an amenable number.

1106521621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1106521621 is an equidigital number, since it uses as much as digits as its factorization.

1106521621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1106521621 is about 33264.4197454277. The cubic root of 1106521621 is about 1034.3161393790.

Adding to 1106521621 its reverse (1261256011), we get a palindrome (2367777632).

The spelling of 1106521621 in words is "one billion, one hundred six million, five hundred twenty-one thousand, six hundred twenty-one".