1213012021111 has 8 divisors (see below), whose sum is σ = 1336387682448. Its totient is φ = 1091820000000.

The previous prime is 1213012021061. The next prime is 1213012021127. The reversal of 1213012021111 is 1111202103121.

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 1213012021111 - 2³³ = 1204422086519 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 (1213012025111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545908890 + ... + 545911111.

It is an arithmetic number, because the mean of its divisors is an integer number (167048460306).

Almost surely, 2^{1213012021111} is an apocalyptic number.

1213012021111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213012021111 is a deficient number, since it is larger than the sum of its proper divisors (123375661337).

1213012021111 is a wasteful number, since it uses less digits than its factorization.

1213012021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091820113.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1213012021111 its reverse (1111202103121), we get a palindrome (2324214124232).

It can be divided in two parts, 121301 and 2021111, that added together give a palindrome (2142412).

The spelling of 1213012021111 in words is "one trillion, two hundred thirteen billion, twelve million, twenty-one thousand, one hundred eleven".