213212122011 has 48 divisors (see below), whose sum is σ = 355652856000. Its totient is φ = 120566502144.

The previous prime is 213212122007. The next prime is 213212122021. The reversal of 213212122011 is 110221212312.

It is not a de Polignac number, because 213212122011 - 2² = 213212122007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213212122021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2482885 + ... + 2567321.

It is an arithmetic number, because the mean of its divisors is an integer number (7409434500).

Almost surely, 2^213212122011 is an apocalyptic number.

213212122011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213212122011 is a deficient number, since it is larger than the sum of its proper divisors (142440733989).

213212122011 is a wasteful number, since it uses less digits than its factorization.

213212122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84868 (or 84865 counting only the distinct ones).

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

Adding to 213212122011 its reverse (110221212312), we get a palindrome (323433334323).

The spelling of 213212122011 in words is "two hundred thirteen billion, two hundred twelve million, one hundred twenty-two thousand, eleven".