1213030012111 has 4 divisors (see below), whose sum is σ = 1213272963232. Its totient is φ = 1212787060992.

The previous prime is 1213030012087. The next prime is 1213030012147. The reversal of 1213030012111 is 1112100303121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213030012111 - 2¹¹ = 1213030010063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213030012811) 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, 121468071 + ... + 121478056.

It is an arithmetic number, because the mean of its divisors is an integer number (303318240808).

Almost surely, 2^{1213030012111} is an apocalyptic number.

1213030012111 is a deficient number, since it is larger than the sum of its proper divisors (242951121).

1213030012111 is an equidigital number, since it uses as much as digits as its factorization.

1213030012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242951120.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1213030012111 its reverse (1112100303121), we get a palindrome (2325130315232).

The spelling of 1213030012111 in words is "one trillion, two hundred thirteen billion, thirty million, twelve thousand, one hundred eleven".