1103102021221 has 2 divisors, whose sum is σ = 1103102021222. Its totient is φ = 1103102021220.

The previous prime is 1103102021209. The next prime is 1103102021293. The reversal of 1103102021221 is 1221202013011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011362092225 + 91739928996 = 1005665^2 + 302886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103102021221 - 2²⁵ = 1103068466789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1103102021195 and 1103102021204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1103102027221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551551010610 + 551551010611.

It is an arithmetic number, because the mean of its divisors is an integer number (551551010611).

Almost surely, 2^{1103102021221} is an apocalyptic number.

It is an amenable number.

1103102021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103102021221 is an equidigital number, since it uses as much as digits as its factorization.

1103102021221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1103102021221 its reverse (1221202013011), we get a palindrome (2324304034232).

The spelling of 1103102021221 in words is "one trillion, one hundred three billion, one hundred two million, twenty-one thousand, two hundred twenty-one".