1101221213 has 4 divisors (see below), whose sum is σ = 1107815520. Its totient is φ = 1094626908.

The previous prime is 1101221197. The next prime is 1101221311. The reversal of 1101221213 is 3121221011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3121221011 = 89 ⋅35069899.

It is a cyclic number.

It is not a de Polignac number, because 1101221213 - 2⁴ = 1101221197 is a prime.

It is a super-2 number, since 2×1101221213² = 2425376319922382738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101221113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3296903 + ... + 3297236.

It is an arithmetic number, because the mean of its divisors is an integer number (276953880).

Almost surely, 2^1101221213 is an apocalyptic number.

It is an amenable number.

1101221213 is a deficient number, since it is larger than the sum of its proper divisors (6594307).

1101221213 is an equidigital number, since it uses as much as digits as its factorization.

1101221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6594306.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1101221213 is about 33184.6532752717. The cubic root of 1101221213 is about 1032.6619844467.

Adding to 1101221213 its reverse (3121221011), we get a palindrome (4222442224).

The spelling of 1101221213 in words is "one billion, one hundred one million, two hundred twenty-one thousand, two hundred thirteen".