1100021047 has 2 divisors, whose sum is σ = 1100021048. Its totient is φ = 1100021046.

The previous prime is 1100021029. The next prime is 1100021077. The reversal of 1100021047 is 7401200011.

It is a weak prime.

It is an emirp because it is prime and its reverse (7401200011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100021047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1100021047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100021077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550010523 + 550010524.

It is an arithmetic number, because the mean of its divisors is an integer number (550010524).

Almost surely, 2^1100021047 is an apocalyptic number.

1100021047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100021047 is an equidigital number, since it uses as much as digits as its factorization.

1100021047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1100021047 is about 33166.5651974997. The cubic root of 1100021047 is about 1032.2866991718.

Adding to 1100021047 its reverse (7401200011), we get a palindrome (8501221058).

The spelling of 1100021047 in words is "one billion, one hundred million, twenty-one thousand, forty-seven".