1213213012011 has 72 divisors (see below), whose sum is σ = 2365826201856. Its totient is φ = 581760429120.

The previous prime is 1213213012009. The next prime is 1213213012019. The reversal of 1213213012011 is 1102103123121.

1213213012011 is a `hidden beast` number, since 1 + 21 + 321 + 301 + 20 + 1 + 1 = 666.

It is not a de Polignac number, because 1213213012011 - 2¹ = 1213213012009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213213012019) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5062375 + ... + 5296608.

It is an arithmetic number, because the mean of its divisors is an integer number (32858697248).

Almost surely, 2^{1213213012011} is an apocalyptic number.

1213213012011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213213012011 is a deficient number, since it is larger than the sum of its proper divisors (1152613189845).

1213213012011 is a wasteful number, since it uses less digits than its factorization.

1213213012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359033 (or 10359017 counting only the distinct ones).

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

Adding to 1213213012011 its reverse (1102103123121), we get a palindrome (2315316135132).

The spelling of 1213213012011 in words is "one trillion, two hundred thirteen billion, two hundred thirteen million, twelve thousand, eleven".