1111021213 has 8 divisors (see below), whose sum is σ = 1176700608. Its totient is φ = 1045377984.

The previous prime is 1111021211. The next prime is 1111021231. The reversal of 1111021213 is 3121201111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1111021213 - 2¹ = 1111021211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111021193 and 1111021202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111021211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78520 + ... + 91582.

It is an arithmetic number, because the mean of its divisors is an integer number (147087576).

Almost surely, 2^1111021213 is an apocalyptic number.

It is an amenable number.

1111021213 is a deficient number, since it is larger than the sum of its proper divisors (65679395).

1111021213 is a wasteful number, since it uses less digits than its factorization.

1111021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18083.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1111021213 is about 33331.9848343899. The cubic root of 1111021213 is about 1035.7162344646.

Adding to 1111021213 its reverse (3121201111), we get a palindrome (4232222324).

It can be divided in two parts, 11110 and 21213, that added together give a palindrome (32323).

The spelling of 1111021213 in words is "one billion, one hundred eleven million, twenty-one thousand, two hundred thirteen".