1102101100021 has 2 divisors, whose sum is σ = 1102101100022. Its totient is φ = 1102101100020.

The previous prime is 1102101099971. The next prime is 1102101100031. The reversal of 1102101100021 is 1200011012011.

It is an a-pointer prime, because the next prime (1102101100031) can be obtained adding 1102101100021 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869955405796 + 232145694225 = 932714^2 + 481815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102101100021 - 2⁹ = 1102101099509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1102101099980 and 1102101100007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1102101100031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551050550010 + 551050550011.

It is an arithmetic number, because the mean of its divisors is an integer number (551050550011).

Almost surely, 2^{1102101100021} is an apocalyptic number.

It is an amenable number.

1102101100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1102101100021 is an equidigital number, since it uses as much as digits as its factorization.

1102101100021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1102101100021 its reverse (1200011012011), we get a palindrome (2302112112032).

The spelling of 1102101100021 in words is "one trillion, one hundred two billion, one hundred one million, one hundred thousand, twenty-one".