1100201112821 has 2 divisors, whose sum is σ = 1100201112822. Its totient is φ = 1100201112820.

The previous prime is 1100201112817. The next prime is 1100201112853. The reversal of 1100201112821 is 1282111020011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 894367404100 + 205833708721 = 945710^2 + 453689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100201112821 - 2² = 1100201112817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100201112793 and 1100201112802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100201115821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550100556410 + 550100556411.

It is an arithmetic number, because the mean of its divisors is an integer number (550100556411).

Almost surely, 2^{1100201112821} is an apocalyptic number.

It is an amenable number.

1100201112821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100201112821 is an equidigital number, since it uses as much as digits as its factorization.

1100201112821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 1100201112821 its reverse (1282111020011), we get a palindrome (2382312132832).

The spelling of 1100201112821 in words is "one trillion, one hundred billion, two hundred one million, one hundred twelve thousand, eight hundred twenty-one".