1212213220011 has 12 divisors (see below), whose sum is σ = 1755341176680. Its totient is φ = 806126827200.

The previous prime is 1212213219941. The next prime is 1212213220013. The reversal of 1212213220011 is 1100223122121.

1212213220011 is a `hidden beast` number, since 121 + 221 + 322 + 0 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 1212213220011 - 2²⁶ = 1212146111147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212213220013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167939481 + ... + 167946698.

It is an arithmetic number, because the mean of its divisors is an integer number (146278431390).

Almost surely, 2^{1212213220011} is an apocalyptic number.

1212213220011 is a deficient number, since it is larger than the sum of its proper divisors (543127956669).

1212213220011 is a wasteful number, since it uses less digits than its factorization.

1212213220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335886586 (or 335886583 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1212213220011 its reverse (1100223122121), we get a palindrome (2312436342132).

The spelling of 1212213220011 in words is "one trillion, two hundred twelve billion, two hundred thirteen million, two hundred twenty thousand, eleven".