21554103041 has 2 divisors, whose sum is σ = 21554103042. Its totient is φ = 21554103040.

The previous prime is 21554103029. The next prime is 21554103121. The reversal of 21554103041 is 14030145512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21141160000 + 412943041 = 145400^2 + 20321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21554103041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21554103041.

It is not a weakly prime, because it can be changed into another prime (21554103941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10777051520 + 10777051521.

It is an arithmetic number, because the mean of its divisors is an integer number (10777051521).

Almost surely, 2^21554103041 is an apocalyptic number.

It is an amenable number.

21554103041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21554103041 is an equidigital number, since it uses as much as digits as its factorization.

21554103041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 21554103041 its reverse (14030145512), we get a palindrome (35584248553).

The spelling of 21554103041 in words is "twenty-one billion, five hundred fifty-four million, one hundred three thousand, forty-one".