1103213101221 has 24 divisors (see below), whose sum is σ = 1986738746304. Its totient is φ = 573097714560.

The previous prime is 1103213101169. The next prime is 1103213101223. The reversal of 1103213101221 is 1221013123011.

1103213101221 is a `hidden beast` number, since 1 + 1 + 0 + 321 + 310 + 12 + 21 = 666.

It is not a de Polignac number, because 1103213101221 - 2¹¹ = 1103213099173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1103213101194 and 1103213101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103213101223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 795968356 + ... + 795969741.

It is an arithmetic number, because the mean of its divisors is an integer number (82780781096).

Almost surely, 2^{1103213101221} is an apocalyptic number.

1103213101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1103213101221 is a deficient number, since it is larger than the sum of its proper divisors (883525645083).

1103213101221 is a wasteful number, since it uses less digits than its factorization.

1103213101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591938121 (or 1591938118 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1103213101221 its reverse (1221013123011), we get a palindrome (2324226224232).

The spelling of 1103213101221 in words is "one trillion, one hundred three billion, two hundred thirteen million, one hundred one thousand, two hundred twenty-one".