11005610621 has 2 divisors, whose sum is σ = 11005610622. Its totient is φ = 11005610620.

The previous prime is 11005610599. The next prime is 11005610639. The reversal of 11005610621 is 12601650011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10902283396 + 103327225 = 104414^2 + 10165^2 .

It is a cyclic number.

It is not a de Polignac number, because 11005610621 - 2²² = 11001416317 is a prime.

It is a super-2 number, since 2×11005610621² (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 (11005610321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5502805310 + 5502805311.

It is an arithmetic number, because the mean of its divisors is an integer number (5502805311).

Almost surely, 2^11005610621 is an apocalyptic number.

It is an amenable number.

11005610621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11005610621 is an equidigital number, since it uses as much as digits as its factorization.

11005610621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 11005610621 in words is "eleven billion, five million, six hundred ten thousand, six hundred twenty-one".